diff --git a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
index 4b2b3f8489fd060fee36f94dfad7ca148d61b34e..3acc60d6c6d65ae4a888afc8296bda690c2c7271 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
@@ -26,11 +26,9 @@ import org.apache.hadoop.fs.Path
import org.json4s._
import org.json4s.jackson.JsonMethods._
-import org.apache.spark.{SparkContext, Logging}
-import org.apache.spark.annotation.{Since, DeveloperApi, Experimental}
+import org.apache.spark.{Logging, SparkContext}
+import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
import org.apache.spark.ml.param.{Param, ParamMap, Params}
-import org.apache.spark.ml.util.MLReader
-import org.apache.spark.ml.util.MLWriter
import org.apache.spark.ml.util._
import org.apache.spark.sql.DataFrame
import org.apache.spark.sql.types.StructType
diff --git a/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala b/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
index e0dcd427fae24d127872d8a0ceea54df2cd3616f..6aacffd4f236f67091b6c3ec272cf69d7cee99e0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
@@ -24,9 +24,9 @@ import org.apache.spark.ml.util.SchemaUtils
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types.{DataType, DoubleType, StructType}
-import org.apache.spark.sql.{DataFrame, Row}
/**
* (private[ml]) Trait for parameters for prediction (regression and classification).
diff --git a/mllib/src/main/scala/org/apache/spark/ml/ann/Layer.scala b/mllib/src/main/scala/org/apache/spark/ml/ann/Layer.scala
index b5258ff3484772ed070b94fab71f9a1f310be726..d02806a6ea227f29297aa2f266f488c9d318a50e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/ann/Layer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/ann/Layer.scala
@@ -17,8 +17,8 @@
package org.apache.spark.ml.ann
-import breeze.linalg.{*, DenseMatrix => BDM, DenseVector => BDV, Vector => BV, axpy => Baxpy,
- sum => Bsum}
+import breeze.linalg.{*, axpy => Baxpy, sum => Bsum, DenseMatrix => BDM, DenseVector => BDV,
+ Vector => BV}
import breeze.numerics.{log => Blog, sigmoid => Bsigmoid}
import org.apache.spark.mllib.linalg.{Vector, Vectors}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala b/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
index a7c10333c0d534b87c5f86e701dfb9acd6531196..521d209a8f0edcd6067474f914825d06ef6c2a53 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.attribute
import scala.annotation.varargs
import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.sql.types.{DoubleType, NumericType, Metadata, MetadataBuilder, StructField}
+import org.apache.spark.sql.types.{DoubleType, Metadata, MetadataBuilder, NumericType, StructField}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/ml/attribute/package.scala b/mllib/src/main/scala/org/apache/spark/ml/attribute/package.scala
index 7ac21d7d563f2b30ae9684b70f660411670c15d3..f6964054db8396968bd58b2052c370a19f26d893 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/attribute/package.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/attribute/package.scala
@@ -17,8 +17,8 @@
package org.apache.spark.ml
-import org.apache.spark.sql.DataFrame
import org.apache.spark.ml.attribute.{Attribute, AttributeGroup}
+import org.apache.spark.sql.DataFrame
/**
* ==ML attributes==
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/Classifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/Classifier.scala
index 45df557a899089415a06983f9189339390a8baa7..8186afc17a53efc12c920db605e3ffe1c824cebf 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/Classifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/Classifier.scala
@@ -18,7 +18,7 @@
package org.apache.spark.ml.classification
import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.ml.{PredictionModel, PredictorParams, Predictor}
+import org.apache.spark.ml.{PredictionModel, Predictor, PredictorParams}
import org.apache.spark.ml.param.shared.HasRawPredictionCol
import org.apache.spark.ml.util.SchemaUtils
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
@@ -26,7 +26,6 @@ import org.apache.spark.sql.DataFrame
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types.{DataType, StructType}
-
/**
* (private[spark]) Params for classification.
*/
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
index cda2bca58c50d847b5901e9e150e0f5f8e5fb521..74bf07c3f1fff56833c0375b0d4ea37affde6b2f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
@@ -33,7 +33,7 @@ import org.apache.spark.mllib.tree.configuration.{Algo => OldAlgo}
import org.apache.spark.mllib.tree.loss.{LogLoss => OldLogLoss, Loss => OldLoss}
import org.apache.spark.mllib.tree.model.{GradientBoostedTreesModel => OldGBTModel}
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{Row, DataFrame}
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types.DoubleType
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
index a691aa005ef54128afad525ae6973c736792c6db..719d1076fee8ec59967a2d785c76a9a0c249d553 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
@@ -20,12 +20,12 @@ package org.apache.spark.ml.classification
import scala.collection.JavaConverters._
import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.param.shared.{HasTol, HasMaxIter, HasSeed}
-import org.apache.spark.ml.{PredictorParams, PredictionModel, Predictor}
-import org.apache.spark.ml.param.{IntParam, ParamValidators, IntArrayParam, ParamMap}
+import org.apache.spark.ml.{PredictionModel, Predictor, PredictorParams}
+import org.apache.spark.ml.ann.{FeedForwardTopology, FeedForwardTrainer}
+import org.apache.spark.ml.param.{IntArrayParam, IntParam, ParamMap, ParamValidators}
+import org.apache.spark.ml.param.shared.{HasMaxIter, HasSeed, HasTol}
import org.apache.spark.ml.util.Identifiable
-import org.apache.spark.ml.ann.{FeedForwardTrainer, FeedForwardTopology}
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.sql.DataFrame
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/ProbabilisticClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/ProbabilisticClassifier.scala
index fdd1851ae550889e347f69b3ddfa603fd9c864a4..865614aa5c8a7fab04de7c1e5517e0431160762a 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/ProbabilisticClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/ProbabilisticClassifier.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.classification
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util.SchemaUtils
-import org.apache.spark.mllib.linalg.{DenseVector, Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{DenseVector, Vector, Vectors, VectorUDT}
import org.apache.spark.sql.DataFrame
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types.{DataType, StructType}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
index d6d85ad2533a22676856c061a3593ae00fe85adc..f7d662df2fe5a6c53dce8ebf8bf925af8651251c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
@@ -18,11 +18,11 @@
package org.apache.spark.ml.classification
import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.tree.impl.RandomForest
import org.apache.spark.ml.param.ParamMap
import org.apache.spark.ml.tree.{DecisionTreeModel, RandomForestParams, TreeClassifierParams, TreeEnsembleModel}
+import org.apache.spark.ml.tree.impl.RandomForest
import org.apache.spark.ml.util.{Identifiable, MetadataUtils}
-import org.apache.spark.mllib.linalg.{SparseVector, DenseVector, Vector, Vectors}
+import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.mllib.tree.configuration.{Algo => OldAlgo}
import org.apache.spark.mllib.tree.model.{RandomForestModel => OldRandomForestModel}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
index 71e968497500feb13cf95a15c5c3644b4f065f92..6e5abb29ff0a3b95a23e98bac193d4793588b45e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
@@ -20,15 +20,15 @@ package org.apache.spark.ml.clustering
import org.apache.hadoop.fs.Path
import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.param.shared._
+import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param.{IntParam, Param, ParamMap, Params}
+import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util._
-import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.mllib.clustering.{KMeans => MLlibKMeans, KMeansModel => MLlibKMeansModel}
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions.{col, udf}
import org.apache.spark.sql.types.{IntegerType, StructType}
-import org.apache.spark.sql.{DataFrame, Row}
/**
* Common params for KMeans and KMeansModel
diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
index 830510b1698d4a3ac71ff18a8c7782320ea341cc..af0b3e1835003008727c19950d07162947efd56c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
@@ -18,19 +18,20 @@
package org.apache.spark.ml.clustering
import org.apache.hadoop.fs.Path
+
import org.apache.spark.Logging
import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.{Estimator, Model}
-import org.apache.spark.ml.param.shared.{HasCheckpointInterval, HasFeaturesCol, HasSeed, HasMaxIter}
import org.apache.spark.ml.param._
+import org.apache.spark.ml.param.shared.{HasCheckpointInterval, HasFeaturesCol, HasMaxIter, HasSeed}
import org.apache.spark.ml.util._
import org.apache.spark.mllib.clustering.{DistributedLDAModel => OldDistributedLDAModel,
EMLDAOptimizer => OldEMLDAOptimizer, LDA => OldLDA, LDAModel => OldLDAModel,
LDAOptimizer => OldLDAOptimizer, LocalLDAModel => OldLocalLDAModel,
OnlineLDAOptimizer => OldOnlineLDAOptimizer}
-import org.apache.spark.mllib.linalg.{VectorUDT, Vectors, Matrix, Vector}
+import org.apache.spark.mllib.linalg.{Matrix, Vector, Vectors, VectorUDT}
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{SQLContext, DataFrame, Row}
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
import org.apache.spark.sql.functions.{col, monotonicallyIncreasingId, udf}
import org.apache.spark.sql.types.StructType
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
index c44db0ec595eadf9de4c6334c7535e8f93e6646d..a921153b9474f411d3885f4d0c962c3ad5bc43a1 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
@@ -18,11 +18,11 @@
package org.apache.spark.ml.evaluation
import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.param.{ParamMap, ParamValidators, Param}
+import org.apache.spark.ml.param.{Param, ParamMap, ParamValidators}
import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
-import org.apache.spark.ml.util.{DefaultParamsReadable, DefaultParamsWritable, SchemaUtils, Identifiable}
+import org.apache.spark.ml.util.{DefaultParamsReadable, DefaultParamsWritable, Identifiable, SchemaUtils}
import org.apache.spark.mllib.evaluation.MulticlassMetrics
-import org.apache.spark.sql.{Row, DataFrame}
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.types.DoubleType
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
index 63c06581482edf68b453e5d2e5a5bf2059342873..5b17d3483b895f19db7dbafe6246eb4e214ef213 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.attribute.BinaryAttribute
import org.apache.spark.ml.param._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
index 324353a96afb35e32299f8eed702e8ac5905265e..33abc7c99d4b0ab7dbbbce20462d8ded3f084013 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.feature
import java.{util => ju}
import org.apache.spark.SparkException
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Model
import org.apache.spark.ml.attribute.NominalAttribute
import org.apache.spark.ml.param._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
index b9e2144c0ad40f96ea315f49e47e85e5a0523f19..1268c87908c62ac2d2f66706ec9e8bb1a7cac9cd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
@@ -24,7 +24,7 @@ import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.util._
-import org.apache.spark.mllib.linalg.{VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vectors, VectorUDT}
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.DataFrame
import org.apache.spark.sql.functions._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
index 6bed72164a1da5e16bfaa32889dac09b8a0176f1..a6f878151de73e1eceb00f2ca814b3c49690efd1 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
@@ -19,11 +19,11 @@ package org.apache.spark.ml.feature
import edu.emory.mathcs.jtransforms.dct._
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.UnaryTransformer
import org.apache.spark.ml.param.BooleanParam
import org.apache.spark.ml.util._
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
import org.apache.spark.sql.types.DataType
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/ElementwiseProduct.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/ElementwiseProduct.scala
index a359cb8f37ec3a5922eec5843cfb09cf020a9213..07a12df32035746266d1d0ced3c7aa71cbc90bcf 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/ElementwiseProduct.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/ElementwiseProduct.scala
@@ -19,7 +19,7 @@ package org.apache.spark.ml.feature
import org.apache.spark.annotation.Experimental
import org.apache.spark.ml.UnaryTransformer
-import org.apache.spark.ml.param.{ParamMap, Param}
+import org.apache.spark.ml.param.{Param, ParamMap}
import org.apache.spark.ml.util.Identifiable
import org.apache.spark.mllib.feature
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
index 9e15835429a38cee12fd22433cfe1ad0b7584558..61a78d73c4347dfbd20bec6278468c89c9a2717d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.attribute.AttributeGroup
import org.apache.spark.ml.param.{IntParam, ParamMap, ParamValidators}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
index 2181119f04a5dcbc958e0e172714a542db1ae735..7d2a1da990fcecc5cfedccde05601f3ef3a29a93 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
@@ -20,13 +20,13 @@ package org.apache.spark.ml.feature
import scala.collection.mutable.ArrayBuilder
import org.apache.spark.SparkException
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.attribute._
import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util._
import org.apache.spark.ml.Transformer
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
index c2866f5eceff3503a51483ffa4f3caab6f30328d..559a025265916217f67974d5e7ccf687e8c2f3ee 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
@@ -17,7 +17,6 @@
package org.apache.spark.ml.feature
-
import org.apache.hadoop.fs.Path
import org.apache.spark.annotation.{Experimental, Since}
@@ -25,7 +24,7 @@ import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param.{DoubleParam, ParamMap, Params}
import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.util._
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
import org.apache.spark.mllib.stat.Statistics
import org.apache.spark.sql._
import org.apache.spark.sql.functions._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
index 65414ecbefbbdfe05218fe024561906253445f88..f8bc7e3f0c031e7564799d609b0e39dd5fc3ff47 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.UnaryTransformer
import org.apache.spark.ml.param._
import org.apache.spark.ml.util._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
index c2d514fd9629ed27128e600d752b9ee0d68e7edc..a603b3f8332027f285c83f722c25d88162226e45 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.UnaryTransformer
import org.apache.spark.ml.param.{DoubleParam, ParamValidators}
import org.apache.spark.ml.util._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
index d70164eaf02248f0e3c6d31574069d96a4478d23..c01e29af478c094604cfc47d9d1e0d94e2516852 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.attribute._
import org.apache.spark.ml.param._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
index 08610593faddadecea810ac48545c395b8148143..42b26c8ee836c937692ce62b561032b7582ad92d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
@@ -19,9 +19,9 @@ package org.apache.spark.ml.feature
import scala.collection.mutable
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.UnaryTransformer
-import org.apache.spark.ml.param.{ParamMap, IntParam, ParamValidators}
+import org.apache.spark.ml.param.{IntParam, ParamMap, ParamValidators}
import org.apache.spark.ml.util._
import org.apache.spark.mllib.linalg._
import org.apache.spark.sql.types.DataType
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
index 7bf67c6325a356f6947317df57a0374a5c8d5035..39de8461dc9c70388b9b64e217b7ad84b7ffa864 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
@@ -20,14 +20,14 @@ package org.apache.spark.ml.feature
import scala.collection.mutable
import org.apache.spark.Logging
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml._
import org.apache.spark.ml.attribute.NominalAttribute
-import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.param.{IntParam, _}
+import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.util._
-import org.apache.spark.sql.types.{DoubleType, StructType}
import org.apache.spark.sql.{DataFrame, Row}
+import org.apache.spark.sql.types.{DoubleType, StructType}
import org.apache.spark.util.random.XORShiftRandom
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
index 5c43a41bee3b4ca118dc8f23997a2d74a9ec22f3..2b578c2a95e16e5233d26adab7bd63ae71bd7361 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
@@ -21,8 +21,8 @@ import scala.collection.mutable
import scala.collection.mutable.ArrayBuffer
import org.apache.spark.annotation.Experimental
-import org.apache.spark.ml.attribute.AttributeGroup
import org.apache.spark.ml.{Estimator, Model, Pipeline, PipelineModel, PipelineStage, Transformer}
+import org.apache.spark.ml.attribute.AttributeGroup
import org.apache.spark.ml.param.{Param, ParamMap}
import org.apache.spark.ml.param.shared.{HasFeaturesCol, HasLabelCol}
import org.apache.spark.ml.util.Identifiable
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
index c09f4d076c964a49592066bf1beda5f8fea16862..e0ca45b9a6190e8f8c5a42ec6026ca19102a83eb 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
@@ -18,11 +18,11 @@
package org.apache.spark.ml.feature
import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Since, Experimental}
-import org.apache.spark.ml.param.{ParamMap, Param}
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.param.{Param, ParamMap}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.util._
-import org.apache.spark.sql.{SQLContext, DataFrame, Row}
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
import org.apache.spark.sql.types.StructType
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
index 318808596dc6a18a337bcff0ca640d7b13a4fc00..5d6936dce2c74efbe3f7fbc77e719ea89dc57d8e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.param.{BooleanParam, ParamMap, StringArrayParam}
import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
index 8ad7bbedaab5ce868e027ffdaf63aefb0c1197b4..8456a0e915804b6147043bd601a795e6caae8727 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.UnaryTransformer
import org.apache.spark.ml.param._
import org.apache.spark.ml.util._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
index 801096fed27bf9698ab9fd751567792401d23feb..e9d1b57b91d071fb531b416625124f050444afa7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
@@ -20,13 +20,13 @@ package org.apache.spark.ml.feature
import scala.collection.mutable.ArrayBuilder
import org.apache.spark.SparkException
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.attribute.{Attribute, AttributeGroup, NumericAttribute, UnresolvedAttribute}
import org.apache.spark.ml.param.ParamMap
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util._
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
index 5410a50bc2e47a470e0f2b7fc7b0a3fa4cd254b4..4813d8a5b5dc05f76361c1dc607d099188f21ad3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
@@ -17,11 +17,11 @@
package org.apache.spark.ml.feature
-import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.Transformer
import org.apache.spark.ml.attribute.{Attribute, AttributeGroup}
-import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.param.{IntArrayParam, ParamMap, StringArrayParam}
+import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
import org.apache.spark.ml.util._
import org.apache.spark.mllib.linalg._
import org.apache.spark.sql.DataFrame
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
index f105a983a34f652e899e677b8a56ddaba695c0e6..59c34cd1703aa37dc1c59634bba30fd49623f550 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
@@ -26,7 +26,7 @@ import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util._
import org.apache.spark.mllib.feature
-import org.apache.spark.mllib.linalg.{BLAS, Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{BLAS, Vector, Vectors, VectorUDT}
import org.apache.spark.sql.{DataFrame, Row, SQLContext}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index 4d82b90bfdf20f5511f8bd889e8a871d799a1793..551e75dc0a02d22251596bf896ea9088966db380 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -17,11 +17,11 @@
package org.apache.spark.ml.api.r
+import org.apache.spark.ml.{Pipeline, PipelineModel}
import org.apache.spark.ml.attribute._
-import org.apache.spark.ml.feature.RFormula
import org.apache.spark.ml.classification.{LogisticRegression, LogisticRegressionModel}
+import org.apache.spark.ml.feature.RFormula
import org.apache.spark.ml.regression.{LinearRegression, LinearRegressionModel}
-import org.apache.spark.ml.{Pipeline, PipelineModel}
import org.apache.spark.sql.DataFrame
private[r] object SparkRWrappers {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index b798aa1fab7678bc29d89f297109bd3167ec2b4f..14a28b8d5b51fbae69ee7406cbdff1e12054401f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -31,7 +31,7 @@ import org.json4s.DefaultFormats
import org.json4s.JsonDSL._
import org.apache.spark.{Logging, Partitioner}
-import org.apache.spark.annotation.{Since, DeveloperApi, Experimental}
+import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index aedfb48058dc57f0ad6b6026ab32b5dc533e7109..3787ca45d5172f2fe4ef09ae383325d54d63b1e5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -23,18 +23,18 @@ import breeze.linalg.{DenseVector => BDV}
import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS}
import org.apache.hadoop.fs.Path
+import org.apache.spark.{Logging, SparkException}
import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.util._
-import org.apache.spark.ml.{Estimator, Model}
-import org.apache.spark.mllib.linalg.{BLAS, Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{BLAS, Vector, Vectors, VectorUDT}
import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions._
import org.apache.spark.sql.types.{DoubleType, StructType}
-import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.storage.StorageLevel
-import org.apache.spark.{Logging, SparkException}
/**
* Params for accelerated failure time (AFT) regression.
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
index bbb1c7ac0a51e97f9a1283de79c92bf8337ca654..e8d361b1a2a8a70d96d84f3311bb80d7d1ea509d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
@@ -21,18 +21,18 @@ import org.apache.hadoop.fs.Path
import org.apache.spark.Logging
import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.{Estimator, Model}
import org.apache.spark.ml.param._
import org.apache.spark.ml.param.shared._
import org.apache.spark.ml.regression.IsotonicRegressionModel.IsotonicRegressionModelWriter
import org.apache.spark.ml.util._
-import org.apache.spark.ml.{Estimator, Model}
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
import org.apache.spark.mllib.regression.{IsotonicRegression => MLlibIsotonicRegression}
import org.apache.spark.mllib.regression.{IsotonicRegressionModel => MLlibIsotonicRegressionModel}
import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.sql.functions.{col, lit, udf}
import org.apache.spark.sql.types.{DoubleType, StructType}
-import org.apache.spark.sql.{DataFrame, Row}
import org.apache.spark.storage.StorageLevel
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 5e5850963edc9ed9ce016ff6a900735d2213cf2b..dee26337dcdf6b71fab2de7a762e6297d53da0d5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -25,9 +25,9 @@ import breeze.stats.distributions.StudentsT
import org.apache.hadoop.fs.Path
import org.apache.spark.{Logging, SparkException}
+import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.feature.Instance
import org.apache.spark.ml.optim.WeightedLeastSquares
-import org.apache.spark.annotation.{Experimental, Since}
import org.apache.spark.ml.PredictorParams
import org.apache.spark.ml.param.ParamMap
import org.apache.spark.ml.param.shared._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/Regressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/Regressor.scala
index c72ef29680329e5ff1f11526763b25fc503b57d0..cf189e8e96f95da8e917eb7a0bc0cec7367e3118 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/Regressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/Regressor.scala
@@ -18,7 +18,7 @@
package org.apache.spark.ml.regression
import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.ml.{PredictionModel, PredictorParams, Predictor}
+import org.apache.spark.ml.{PredictionModel, Predictor, PredictorParams}
/**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala b/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
index 11b9815ecc83279b3a56e866584c09c9a0d236d8..1bed542c4031605cd44bdc71f094df68bd39a7c7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
@@ -24,7 +24,7 @@ import org.apache.spark.annotation.Since
import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
import org.apache.spark.mllib.util.MLUtils
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{DataFrameReader, DataFrame, Row, SQLContext}
+import org.apache.spark.sql.{DataFrame, DataFrameReader, Row, SQLContext}
import org.apache.spark.sql.sources._
import org.apache.spark.sql.types.{DoubleType, StructField, StructType}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
index 9cfd466294b95047b05f6601b6b72012ce127810..6507a8ad7cf3f7b59d2802b381678d677a480ca0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
@@ -20,8 +20,8 @@ package org.apache.spark.ml.tree
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.mllib.linalg.Vector
import org.apache.spark.mllib.tree.impurity.ImpurityCalculator
-import org.apache.spark.mllib.tree.model.{InformationGainStats => OldInformationGainStats,
- Node => OldNode, Predict => OldPredict, ImpurityStats}
+import org.apache.spark.mllib.tree.model.{ImpurityStats,
+ InformationGainStats => OldInformationGainStats, Node => OldNode, Predict => OldPredict}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
index 1ee01131d6334e30de0e7ac295b668c4ae5a0c41..172ea52820564c1f3731d843c93127c98d17cc71 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
@@ -21,7 +21,7 @@ import java.io.IOException
import scala.collection.mutable
-import org.apache.hadoop.fs.{Path, FileSystem}
+import org.apache.hadoop.fs.{FileSystem, Path}
import org.apache.spark.Logging
import org.apache.spark.annotation.DeveloperApi
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
index 4a3b12d1440b84ac375e536306d9cee5c734f333..6e87302c7779bbfa15f7f678b824004eb8c7ff58 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
@@ -26,10 +26,10 @@ import org.apache.spark.Logging
import org.apache.spark.ml.classification.DecisionTreeClassificationModel
import org.apache.spark.ml.regression.DecisionTreeRegressionModel
import org.apache.spark.ml.tree._
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.mllib.tree.configuration.{Algo => OldAlgo, Strategy => OldStrategy}
-import org.apache.spark.mllib.tree.impl.{BaggedPoint, DTStatsAggregator, DecisionTreeMetadata,
+import org.apache.spark.mllib.tree.impl.{BaggedPoint, DecisionTreeMetadata, DTStatsAggregator,
TimeTracker}
import org.apache.spark.mllib.tree.impurity.ImpurityCalculator
import org.apache.spark.mllib.tree.model.ImpurityStats
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/treeModels.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/treeModels.scala
index b77191156f68f4fdb3f7fc221afe3a8d3879aa83..40ed95773e1493d58182960d8021aedc7e522db4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/treeModels.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/treeModels.scala
@@ -17,7 +17,7 @@
package org.apache.spark.ml.tree
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
/**
* Abstraction for Decision Tree models.
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
index 40f8857fc58660cc28d06dea933c20e7f7d2ecd8..477675cad1a90a9e2a4d088991a15b1081eb4f3b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
@@ -19,8 +19,8 @@ package org.apache.spark.ml.tuning
import com.github.fommil.netlib.F2jBLAS
import org.apache.hadoop.fs.Path
-import org.json4s.jackson.JsonMethods._
import org.json4s.{DefaultFormats, JObject}
+import org.json4s.jackson.JsonMethods._
import org.apache.spark.{Logging, SparkContext}
import org.apache.spark.annotation.{Experimental, Since}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/TrainValidationSplit.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/TrainValidationSplit.scala
index adf06302047a753743078158669ed50af40e1ebf..f346ea655ae5a09a0fe10580c2f9ff348a9e6c9e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/TrainValidationSplit.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/TrainValidationSplit.scala
@@ -19,8 +19,8 @@ package org.apache.spark.ml.tuning
import org.apache.spark.Logging
import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.evaluation.Evaluator
import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.ml.evaluation.Evaluator
import org.apache.spark.ml.param.{DoubleParam, ParamMap, ParamValidators}
import org.apache.spark.ml.util.Identifiable
import org.apache.spark.sql.DataFrame
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/ValidatorParams.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/ValidatorParams.scala
index 8897ab0825acd2425368f3896a6c1317464af7e9..553f25417241095e0697409a1b6c255692a5d0d7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/ValidatorParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/ValidatorParams.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.tuning
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.ml.Estimator
import org.apache.spark.ml.evaluation.Evaluator
-import org.apache.spark.ml.param.{ParamMap, Param, Params}
+import org.apache.spark.ml.param.{Param, ParamMap, Params}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PowerIterationClusteringModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PowerIterationClusteringModelWrapper.scala
index bc6041b221732a34cad2e0e10e6265e447d54332..6530870b83a11a4f00eba685427bfd307d26b74d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PowerIterationClusteringModelWrapper.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PowerIterationClusteringModelWrapper.scala
@@ -17,8 +17,8 @@
package org.apache.spark.mllib.api.python
-import org.apache.spark.rdd.RDD
import org.apache.spark.mllib.clustering.PowerIterationClusteringModel
+import org.apache.spark.rdd.RDD
/**
* A Wrapper of PowerIterationClusteringModel to provide helper method for Python
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
index f6826ddbfabfe7ef5b2a0d0b219fc295c0e503b9..061db56c749381ddca98e3258c1b3bff97a5177b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
@@ -42,18 +42,17 @@ import org.apache.spark.mllib.optimization._
import org.apache.spark.mllib.random.{RandomRDDs => RG}
import org.apache.spark.mllib.recommendation._
import org.apache.spark.mllib.regression._
+import org.apache.spark.mllib.stat.{
+ KernelDensity, MultivariateStatisticalSummary, Statistics}
import org.apache.spark.mllib.stat.correlation.CorrelationNames
import org.apache.spark.mllib.stat.distribution.MultivariateGaussian
import org.apache.spark.mllib.stat.test.{ChiSqTestResult, KolmogorovSmirnovTestResult}
-import org.apache.spark.mllib.stat.{
- KernelDensity, MultivariateStatisticalSummary, Statistics}
+import org.apache.spark.mllib.tree.{DecisionTree, GradientBoostedTrees, RandomForest}
import org.apache.spark.mllib.tree.configuration.{Algo, BoostingStrategy, Strategy}
import org.apache.spark.mllib.tree.impurity._
import org.apache.spark.mllib.tree.loss.Losses
import org.apache.spark.mllib.tree.model.{DecisionTreeModel, GradientBoostedTreesModel, RandomForestModel}
-import org.apache.spark.mllib.tree.{DecisionTree, GradientBoostedTrees, RandomForest}
-import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.mllib.util.LinearDataGenerator
+import org.apache.spark.mllib.util.{LinearDataGenerator, MLUtils}
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.{DataFrame, Row, SQLContext}
import org.apache.spark.storage.StorageLevel
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/Word2VecModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/Word2VecModelWrapper.scala
index 0f55980481dcb6491fe062d04273d2de3f952fc6..55dfd973eb25fc3562829de0530fd760f444234c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/Word2VecModelWrapper.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/Word2VecModelWrapper.scala
@@ -18,6 +18,7 @@
package org.apache.spark.mllib.api.python
import java.util.{ArrayList => JArrayList, List => JList, Map => JMap}
+
import scala.collection.JavaConverters._
import org.apache.spark.SparkContext
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
index 2d52abc122bf256beb20b360c665e09519357f24..2a7697b5a79cc86c95eddcc93652aa3b7c010021 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
@@ -20,12 +20,12 @@ package org.apache.spark.mllib.classification
import org.apache.spark.SparkContext
import org.apache.spark.annotation.Since
import org.apache.spark.mllib.classification.impl.GLMClassificationModel
-import org.apache.spark.mllib.linalg.BLAS.dot
import org.apache.spark.mllib.linalg.{DenseVector, Vector}
+import org.apache.spark.mllib.linalg.BLAS.dot
import org.apache.spark.mllib.optimization._
import org.apache.spark.mllib.pmml.PMMLExportable
import org.apache.spark.mllib.regression._
-import org.apache.spark.mllib.util.{DataValidators, Saveable, Loader}
+import org.apache.spark.mllib.util.{DataValidators, Loader, Saveable}
import org.apache.spark.rdd.RDD
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
index 74d13e4f77945d3449e08bf69a0665ee8de0b3d4..5c9bc62cb09bbe8169c604320eb3b9200bdb5dec 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
@@ -18,7 +18,6 @@
package org.apache.spark.mllib.clustering
import breeze.linalg.{DenseVector => BreezeVector}
-
import org.json4s.DefaultFormats
import org.json4s.JsonDSL._
import org.json4s.jackson.JsonMethods._
@@ -26,11 +25,11 @@ import org.json4s.jackson.JsonMethods._
import org.apache.spark.SparkContext
import org.apache.spark.annotation.Since
import org.apache.spark.api.java.JavaRDD
-import org.apache.spark.mllib.linalg.{Vector, Matrices, Matrix}
+import org.apache.spark.mllib.linalg.{Matrices, Matrix, Vector}
import org.apache.spark.mllib.stat.distribution.MultivariateGaussian
-import org.apache.spark.mllib.util.{MLUtils, Loader, Saveable}
+import org.apache.spark.mllib.util.{Loader, MLUtils, Saveable}
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{SQLContext, Row}
+import org.apache.spark.sql.{Row, SQLContext}
/**
* Multivariate Gaussian Mixture Model (GMM) consisting of k Gaussians, where points
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeansModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeansModel.scala
index 91fa9b0d3590d1354f178d4f5eb3ed3da6248da3..26c6235fe59071fe95c12dcf09ba9d762701433c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeansModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeansModel.scala
@@ -23,15 +23,14 @@ import org.json4s._
import org.json4s.JsonDSL._
import org.json4s.jackson.JsonMethods._
+import org.apache.spark.SparkContext
import org.apache.spark.annotation.Since
import org.apache.spark.api.java.JavaRDD
import org.apache.spark.mllib.linalg.Vector
import org.apache.spark.mllib.pmml.PMMLExportable
import org.apache.spark.mllib.util.{Loader, Saveable}
import org.apache.spark.rdd.RDD
-import org.apache.spark.SparkContext
-import org.apache.spark.sql.SQLContext
-import org.apache.spark.sql.Row
+import org.apache.spark.sql.{Row, SQLContext}
/**
* A clustering model for K-means. Each point belongs to the cluster with the closest center.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
index 7384d065a2ea8ffc113b95933617431e68a7ea9d..2fce3ff641101f7b5617e07786d38f5353cd721c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
@@ -17,7 +17,7 @@
package org.apache.spark.mllib.clustering
-import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV, argmax, argtopk, normalize, sum}
+import breeze.linalg.{argmax, argtopk, normalize, sum, DenseMatrix => BDM, DenseVector => BDV}
import breeze.numerics.{exp, lgamma}
import org.apache.hadoop.fs.Path
import org.json4s.DefaultFormats
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
index 17c0609800e903a39d338a54dd413728426dcd77..c19595e6cd21bef236369c55bb48cb13310f785e 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
@@ -19,8 +19,8 @@ package org.apache.spark.mllib.clustering
import java.util.Random
-import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV, all, normalize, sum}
-import breeze.numerics.{trigamma, abs, exp}
+import breeze.linalg.{all, normalize, sum, DenseMatrix => BDM, DenseVector => BDV}
+import breeze.numerics.{abs, exp, trigamma}
import breeze.stats.distributions.{Gamma, RandBasis}
import org.apache.spark.annotation.{DeveloperApi, Since}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAUtils.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAUtils.scala
index a9ba7b60bad08eb9aa2100fa1a9cefd39a4bf7e2..647d37bd822c1fa83965fbea20c04204cae272f0 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAUtils.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAUtils.scala
@@ -16,7 +16,7 @@
*/
package org.apache.spark.mllib.clustering
-import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV, max, sum}
+import breeze.linalg.{max, sum, DenseMatrix => BDM, DenseVector => BDV}
import breeze.numerics._
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LocalKMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LocalKMeans.scala
index b2f140e1b1352b0f1c6b934386dc30dced5fc86e..c9a96c68667afbf963d671e72c7141d82a56b91a 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LocalKMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LocalKMeans.scala
@@ -20,8 +20,8 @@ package org.apache.spark.mllib.clustering
import scala.util.Random
import org.apache.spark.Logging
-import org.apache.spark.mllib.linalg.Vectors
import org.apache.spark.mllib.linalg.BLAS.{axpy, scal}
+import org.apache.spark.mllib.linalg.Vectors
/**
* An utility object to run K-means locally. This is private to the ML package because it's used
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
index bb1804505948bb16074079eba75e695c67f75952..2ab0920b06363d2a555988c2b534cfffc51df88b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
@@ -17,10 +17,11 @@
package org.apache.spark.mllib.clustering
-import org.json4s.JsonDSL._
import org.json4s._
+import org.json4s.JsonDSL._
import org.json4s.jackson.JsonMethods._
+import org.apache.spark.{Logging, SparkContext, SparkException}
import org.apache.spark.annotation.Since
import org.apache.spark.api.java.JavaRDD
import org.apache.spark.graphx._
@@ -30,7 +31,6 @@ import org.apache.spark.mllib.util.{Loader, MLUtils, Saveable}
import org.apache.spark.rdd.RDD
import org.apache.spark.sql.{Row, SQLContext}
import org.apache.spark.util.random.XORShiftRandom
-import org.apache.spark.{Logging, SparkContext, SparkException}
/**
* Model produced by [[PowerIterationClustering]].
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
index 80843719f50b49b28107ad3b78502704cbc2ab54..79d217e183c6219de2c02b77bdc06000318d5fd0 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
@@ -24,7 +24,7 @@ import org.apache.spark.annotation.Since
import org.apache.spark.api.java.JavaSparkContext._
import org.apache.spark.mllib.linalg.{BLAS, Vector, Vectors}
import org.apache.spark.rdd.RDD
-import org.apache.spark.streaming.api.java.{JavaPairDStream, JavaDStream}
+import org.apache.spark.streaming.api.java.{JavaDStream, JavaPairDStream}
import org.apache.spark.streaming.dstream.DStream
import org.apache.spark.util.Utils
import org.apache.spark.util.random.XORShiftRandom
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/AreaUnderCurve.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/AreaUnderCurve.scala
index 078fbfbe4f0e1f71c1979eae05ebcaa0550c12a4..f0779491e6374e7133fd09d325000be689a3d0a9 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/AreaUnderCurve.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/AreaUnderCurve.scala
@@ -17,8 +17,8 @@
package org.apache.spark.mllib.evaluation
-import org.apache.spark.rdd.RDD
import org.apache.spark.mllib.rdd.RDDFunctions._
+import org.apache.spark.rdd.RDD
/**
* Computes the area under the curve (AUC) using the trapezoidal rule.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
index cc01936dd34b29e09dfe331a8e178785bbb7c664..f8de4e2220c4dee454ffa8271e38ce71728f79a8 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
@@ -24,7 +24,7 @@ import scala.reflect.ClassTag
import org.apache.spark.Logging
import org.apache.spark.annotation.Since
-import org.apache.spark.api.java.{JavaSparkContext, JavaRDD}
+import org.apache.spark.api.java.{JavaRDD, JavaSparkContext}
import org.apache.spark.rdd.RDD
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
index 1d8f4fe340fb467a15d61504e2cf627f553955e0..34883f2f390d186208d5069bb915cc2c271df1db 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
@@ -21,7 +21,7 @@ import org.apache.spark.annotation.Since
import org.apache.spark.rdd.RDD
import org.apache.spark.Logging
import org.apache.spark.mllib.linalg.Vectors
-import org.apache.spark.mllib.stat.{MultivariateStatisticalSummary, MultivariateOnlineSummarizer}
+import org.apache.spark.mllib.stat.{MultivariateOnlineSummarizer, MultivariateStatisticalSummary}
import org.apache.spark.sql.DataFrame
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
index eaa99cfe82e2702625fe46a997db1e54706441eb..33728bf5d77e5cda2d258e7637c19eca5124b533 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
@@ -30,7 +30,7 @@ import org.apache.spark.mllib.stat.Statistics
import org.apache.spark.mllib.util.{Loader, Saveable}
import org.apache.spark.rdd.RDD
import org.apache.spark.SparkContext
-import org.apache.spark.sql.{SQLContext, Row}
+import org.apache.spark.sql.{Row, SQLContext}
/**
* Chi Squared selector model.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
index 1f400e1430eba750004589312c360bb5d75fd296..a7e1b76df6a7de29ac2a872f7623f1d64fcd9b3c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
@@ -24,7 +24,6 @@ import scala.collection.mutable
import scala.collection.mutable.ArrayBuilder
import com.github.fommil.netlib.BLAS.{getInstance => blas}
-
import org.json4s.DefaultFormats
import org.json4s.JsonDSL._
import org.json4s.jackson.JsonMethods._
@@ -36,9 +35,9 @@ import org.apache.spark.api.java.JavaRDD
import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.mllib.util.{Loader, Saveable}
import org.apache.spark.rdd._
+import org.apache.spark.sql.SQLContext
import org.apache.spark.util.Utils
import org.apache.spark.util.random.XORShiftRandom
-import org.apache.spark.sql.SQLContext
/**
* Entry in vocabulary
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala b/mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
index 97916daa2e9ad59157b8d03a8f561b96ae4b70a1..ed49c9492fdcd37be604a302df8970ec84497a32 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/fpm/PrefixSpan.scala
@@ -20,8 +20,8 @@ package org.apache.spark.mllib.fpm
import java.{lang => jl, util => ju}
import java.util.concurrent.atomic.AtomicInteger
-import scala.collection.mutable
import scala.collection.JavaConverters._
+import scala.collection.mutable
import scala.reflect.ClassTag
import org.apache.spark.Logging
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/impl/PeriodicCheckpointer.scala b/mllib/src/main/scala/org/apache/spark/mllib/impl/PeriodicCheckpointer.scala
index 72d3aabc9b1f4a454f798864dbf5845e80771442..57ca4d3464f15b5636f87a5b262640ea6aebfb92 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/impl/PeriodicCheckpointer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/impl/PeriodicCheckpointer.scala
@@ -19,9 +19,9 @@ package org.apache.spark.mllib.impl
import scala.collection.mutable
-import org.apache.hadoop.fs.{Path, FileSystem}
+import org.apache.hadoop.fs.{FileSystem, Path}
-import org.apache.spark.{SparkContext, Logging}
+import org.apache.spark.{Logging, SparkContext}
import org.apache.spark.storage.StorageLevel
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
index 863abe86d38d7343077ea88be1186b30f7abb723..bb94745f078e88bc1c19b14843a84092809b7b92 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
@@ -19,7 +19,7 @@ package org.apache.spark.mllib.linalg
import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV}
import com.github.fommil.netlib.ARPACK
-import org.netlib.util.{intW, doubleW}
+import org.netlib.util.{doubleW, intW}
/**
* Compute eigen-decomposition.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
index 8879dcf75c9bfe989ed5760152eb210525bf506d..d7a74db0b1fd8b49a141ce524487bafab15b2bf7 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
@@ -19,7 +19,7 @@ package org.apache.spark.mllib.linalg
import java.util.{Arrays, Random}
-import scala.collection.mutable.{ArrayBuilder => MArrayBuilder, HashSet => MHashSet, ArrayBuffer}
+import scala.collection.mutable.{ArrayBuffer, ArrayBuilder => MArrayBuilder, HashSet => MHashSet}
import breeze.linalg.{CSCMatrix => BSM, DenseMatrix => BDM, Matrix => BM}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
index 4dcf351df43fa7decf5fdd02134f85cc2f4c8725..cecfd067bd8746e54bf1e443d45782f02dffc466 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
@@ -17,8 +17,8 @@
package org.apache.spark.mllib.linalg
-import java.util
import java.lang.{Double => JavaDouble, Integer => JavaInteger, Iterable => JavaIterable}
+import java.util
import scala.annotation.varargs
import scala.collection.JavaConverters._
@@ -26,7 +26,7 @@ import scala.collection.JavaConverters._
import breeze.linalg.{DenseVector => BDV, SparseVector => BSV, Vector => BV}
import org.json4s.DefaultFormats
import org.json4s.JsonDSL._
-import org.json4s.jackson.JsonMethods.{compact, render, parse => parseJson}
+import org.json4s.jackson.JsonMethods.{compact, parse => parseJson, render}
import org.apache.spark.SparkException
import org.apache.spark.annotation.{AlphaComponent, Since}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
index 8a70f34e70f6ad3be958d76b7b236a45d9c83ab3..97b03b340f20e61e350a3f0c36d9d5be05b792de 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
@@ -20,8 +20,8 @@ package org.apache.spark.mllib.linalg.distributed
import breeze.linalg.{DenseMatrix => BDM}
import org.apache.spark.annotation.Since
-import org.apache.spark.rdd.RDD
import org.apache.spark.mllib.linalg.{Matrix, SparseMatrix, Vectors}
+import org.apache.spark.rdd.RDD
/**
* Represents an entry in an distributed matrix.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
index 976299124cedd66f520474ab0af39de145e7addb..e8de515211a18c610707f767352052c5c2bca230 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
@@ -20,9 +20,9 @@ package org.apache.spark.mllib.linalg.distributed
import breeze.linalg.{DenseMatrix => BDM}
import org.apache.spark.annotation.Since
-import org.apache.spark.rdd.RDD
import org.apache.spark.mllib.linalg._
import org.apache.spark.mllib.linalg.SingularValueDecomposition
+import org.apache.spark.rdd.RDD
/**
* Represents a row of [[org.apache.spark.mllib.linalg.distributed.IndexedRowMatrix]].
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
index 2018a678688e1fabfdc1de8a1515dfe709194717..0a36da41013391343bc87108dbf7eb42302c3c17 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
@@ -21,8 +21,8 @@ import java.util.Arrays
import scala.collection.mutable.ListBuffer
-import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV, SparseVector => BSV, axpy => brzAxpy,
- svd => brzSvd, MatrixSingularException, inv}
+import breeze.linalg.{axpy => brzAxpy, inv, svd => brzSvd, DenseMatrix => BDM, DenseVector => BDV,
+ MatrixSingularException, SparseVector => BSV}
import breeze.numerics.{sqrt => brzSqrt}
import org.apache.spark.Logging
@@ -30,8 +30,8 @@ import org.apache.spark.annotation.Since
import org.apache.spark.mllib.linalg._
import org.apache.spark.mllib.stat.{MultivariateOnlineSummarizer, MultivariateStatisticalSummary}
import org.apache.spark.rdd.RDD
-import org.apache.spark.util.random.XORShiftRandom
import org.apache.spark.storage.StorageLevel
+import org.apache.spark.util.random.XORShiftRandom
/**
* Represents a row-oriented distributed Matrix with no meaningful row indices.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/optimization/GradientDescent.scala b/mllib/src/main/scala/org/apache/spark/mllib/optimization/GradientDescent.scala
index 37bb6f6097f6781e15e405bbd2eb432eaeae8c0a..5873669b37e36309fac9c26779609190eedad75d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/optimization/GradientDescent.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/optimization/GradientDescent.scala
@@ -19,12 +19,12 @@ package org.apache.spark.mllib.optimization
import scala.collection.mutable.ArrayBuffer
-import breeze.linalg.{DenseVector => BDV, norm}
+import breeze.linalg.{norm, DenseVector => BDV}
-import org.apache.spark.annotation.{Experimental, DeveloperApi}
import org.apache.spark.Logging
+import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.rdd.RDD
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/optimization/Optimizer.scala b/mllib/src/main/scala/org/apache/spark/mllib/optimization/Optimizer.scala
index 7f6d94571b5ef71abb082607565af78eb74ce4be..d8e56720967d885b480d430a5fab6d8bdb94484b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/optimization/Optimizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/optimization/Optimizer.scala
@@ -17,10 +17,9 @@
package org.apache.spark.mllib.optimization
-import org.apache.spark.rdd.RDD
-
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.mllib.linalg.Vector
+import org.apache.spark.rdd.RDD
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/optimization/Updater.scala b/mllib/src/main/scala/org/apache/spark/mllib/optimization/Updater.scala
index 9f463e0cafb6fbe8b7a211567b79cd7ea5842ed6..03c01e0553d78f1587b2e570b9344f86612e0c7c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/optimization/Updater.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/optimization/Updater.scala
@@ -19,10 +19,10 @@ package org.apache.spark.mllib.optimization
import scala.math._
-import breeze.linalg.{norm => brzNorm, axpy => brzAxpy, Vector => BV}
+import breeze.linalg.{axpy => brzAxpy, norm => brzNorm, Vector => BV}
import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomDataGenerator.scala b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomDataGenerator.scala
index 9eab7efc160dae6ee37eea245d43be51c809d01e..fa04f8eb5e7960c7c67f727d65e88c5658f229da 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomDataGenerator.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomDataGenerator.scala
@@ -19,8 +19,8 @@ package org.apache.spark.mllib.random
import org.apache.commons.math3.distribution._
-import org.apache.spark.annotation.{Since, DeveloperApi}
-import org.apache.spark.util.random.{XORShiftRandom, Pseudorandom}
+import org.apache.spark.annotation.{DeveloperApi, Since}
+import org.apache.spark.util.random.{Pseudorandom, XORShiftRandom}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/rdd/RandomRDD.scala b/mllib/src/main/scala/org/apache/spark/mllib/rdd/RandomRDD.scala
index f8cea7ecea6bf075398e360dc6a1019e9f3e5f87..92bc66949ae80126eef89666d53956f585d8d3bf 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/rdd/RandomRDD.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/rdd/RandomRDD.scala
@@ -17,15 +17,15 @@
package org.apache.spark.mllib.rdd
+import scala.reflect.ClassTag
+import scala.util.Random
+
import org.apache.spark.{Partition, SparkContext, TaskContext}
import org.apache.spark.mllib.linalg.{DenseVector, Vector}
import org.apache.spark.mllib.random.RandomDataGenerator
import org.apache.spark.rdd.RDD
import org.apache.spark.util.Utils
-import scala.reflect.ClassTag
-import scala.util.Random
-
private[mllib] class RandomRDDPartition[T](override val index: Int,
val size: Int,
val generator: RandomDataGenerator[T],
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala b/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
index ead8db6344998b85fbe850f26e9626bdb533d96c..adb5e51947f6dacec845ee81c917947f53450a1a 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
@@ -20,7 +20,7 @@ package org.apache.spark.mllib.rdd
import scala.collection.mutable
import scala.reflect.ClassTag
-import org.apache.spark.{TaskContext, Partition}
+import org.apache.spark.{Partition, TaskContext}
import org.apache.spark.rdd.RDD
private[mllib]
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala
index 8f657bfb9c730504bdb362f7ef71841ff5510330..e60edc675c83f73ddb2c0fd2a237f620785711f8 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/GeneralizedLinearAlgorithm.scala
@@ -17,13 +17,13 @@
package org.apache.spark.mllib.regression
+import org.apache.spark.{Logging, SparkException}
import org.apache.spark.annotation.{DeveloperApi, Since}
import org.apache.spark.mllib.feature.StandardScaler
-import org.apache.spark.{Logging, SparkException}
-import org.apache.spark.rdd.RDD
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.mllib.optimization._
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
import org.apache.spark.mllib.util.MLUtils._
+import org.apache.spark.rdd.RDD
import org.apache.spark.storage.StorageLevel
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/LabeledPoint.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/LabeledPoint.scala
index c284ad2325374f774b4c1a08d3cdd0baa2057823..45540f0c5c4ce730e6006e809c537e4a7360d04d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/LabeledPoint.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/LabeledPoint.scala
@@ -20,7 +20,7 @@ package org.apache.spark.mllib.regression
import scala.beans.BeanInfo
import org.apache.spark.annotation.Since
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
import org.apache.spark.mllib.util.NumericParser
import org.apache.spark.SparkException
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
index a9aba173fa0e3c5b7e844b02ba54d57bc0135b96..d55e5dfdaaf5345ccca7539d40d2c241c0bb6351 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/Lasso.scala
@@ -23,7 +23,7 @@ import org.apache.spark.mllib.linalg.Vector
import org.apache.spark.mllib.optimization._
import org.apache.spark.mllib.pmml.PMMLExportable
import org.apache.spark.mllib.regression.impl.GLMRegressionModel
-import org.apache.spark.mllib.util.{Saveable, Loader}
+import org.apache.spark.mllib.util.{Loader, Saveable}
import org.apache.spark.rdd.RDD
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/LinearRegression.scala
index 4996ace5df85d2a933738c2587b73a19878b8f43..7da82c862a2b1104d164fda019b1d44fc0daa528 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/LinearRegression.scala
@@ -23,7 +23,7 @@ import org.apache.spark.mllib.linalg.Vector
import org.apache.spark.mllib.optimization._
import org.apache.spark.mllib.pmml.PMMLExportable
import org.apache.spark.mllib.regression.impl.GLMRegressionModel
-import org.apache.spark.mllib.util.{Saveable, Loader}
+import org.apache.spark.mllib.util.{Loader, Saveable}
import org.apache.spark.rdd.RDD
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizer.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizer.scala
index 201333c3690dfb4b295a36f179044e9c825fbf8a..98404be2603c73bdb71f448d024bf0f79a0478e8 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizer.scala
@@ -18,7 +18,7 @@
package org.apache.spark.mllib.stat
import org.apache.spark.annotation.{DeveloperApi, Since}
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
index bcb33a7a04677680169a4e3cf73c44b5f64303b4..f3159f7e724cc4e8be324bd96f89b5a2e66501fc 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
@@ -20,9 +20,9 @@ package org.apache.spark.mllib.stat
import scala.annotation.varargs
import org.apache.spark.annotation.Since
-import org.apache.spark.api.java.{JavaRDD, JavaDoubleRDD}
-import org.apache.spark.mllib.linalg.distributed.RowMatrix
+import org.apache.spark.api.java.{JavaDoubleRDD, JavaRDD}
import org.apache.spark.mllib.linalg.{Matrix, Vector}
+import org.apache.spark.mllib.linalg.distributed.RowMatrix
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.mllib.stat.correlation.Correlations
import org.apache.spark.mllib.stat.test.{ChiSqTest, ChiSqTestResult, KolmogorovSmirnovTest,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
index 0724af93088c2ae7d21b5fad14f27b8cfc74146f..052b5b1d65b07b74e3d8e012031547b864d833f0 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
@@ -17,10 +17,10 @@
package org.apache.spark.mllib.stat.distribution
-import breeze.linalg.{DenseVector => DBV, DenseMatrix => DBM, diag, max, eigSym, Vector => BV}
+import breeze.linalg.{diag, eigSym, max, DenseMatrix => DBM, DenseVector => DBV, Vector => BV}
import org.apache.spark.annotation.{DeveloperApi, Since}
-import org.apache.spark.mllib.linalg.{Vectors, Vector, Matrices, Matrix}
+import org.apache.spark.mllib.linalg.{Matrices, Matrix, Vector, Vectors}
import org.apache.spark.mllib.util.MLUtils
/**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/ChiSqTest.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/ChiSqTest.scala
index 23c8d7c7c8075d38dd9da5742a648481908064c1..f22f2df320f0de858f00736bffb0266a2d63e0a3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/ChiSqTest.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/ChiSqTest.scala
@@ -17,16 +17,16 @@
package org.apache.spark.mllib.stat.test
+import scala.collection.mutable
+
import breeze.linalg.{DenseMatrix => BDM}
import org.apache.commons.math3.distribution.ChiSquaredDistribution
-import org.apache.spark.{SparkException, Logging}
+import org.apache.spark.{Logging, SparkException}
import org.apache.spark.mllib.linalg.{Matrices, Matrix, Vector, Vectors}
import org.apache.spark.mllib.regression.LabeledPoint
import org.apache.spark.rdd.RDD
-import scala.collection.mutable
-
/**
* Conduct the chi-squared test for the input RDDs using the specified method.
* Goodness-of-fit test is conducted on two `Vectors`, whereas test of independence is conducted
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
index d2513a9d5c5bb15a62782c7b595c3b71aafbd9d6..0b118a76733fd8c2c16357350b8bbfeec7d74ba3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
@@ -21,7 +21,7 @@ import scala.beans.BeanProperty
import org.apache.spark.annotation.Since
import org.apache.spark.mllib.tree.configuration.Algo._
-import org.apache.spark.mllib.tree.loss.{LogLoss, SquaredError, Loss}
+import org.apache.spark.mllib.tree.loss.{LogLoss, Loss, SquaredError}
/**
* Configuration options for [[org.apache.spark.mllib.tree.GradientBoostedTrees]].
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
index 372d6617a40146d7f1bc0dda4661356dbda54b89..6c04403f1ad75ce08fbbe4dd7aaf1979071e5e1c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
@@ -21,9 +21,9 @@ import scala.beans.BeanProperty
import scala.collection.JavaConverters._
import org.apache.spark.annotation.Since
-import org.apache.spark.mllib.tree.impurity.{Variance, Entropy, Gini, Impurity}
import org.apache.spark.mllib.tree.configuration.Algo._
import org.apache.spark.mllib.tree.configuration.QuantileStrategy._
+import org.apache.spark.mllib.tree.impurity.{Entropy, Gini, Impurity, Variance}
/**
* Stores all the configuration options for tree construction
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
index 1c611976a9308477633710f1357ac9ae56abfbdc..fbbec1197404a84e8aa799448c9d9affcf662509 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
@@ -19,13 +19,13 @@ package org.apache.spark.mllib.tree.impl
import scala.collection.mutable
-import org.apache.hadoop.fs.{Path, FileSystem}
+import org.apache.hadoop.fs.{FileSystem, Path}
-import org.apache.spark.rdd.RDD
import org.apache.spark.annotation.DeveloperApi
import org.apache.spark.mllib.tree.configuration.FeatureType._
-import org.apache.spark.storage.StorageLevel
import org.apache.spark.mllib.tree.model.{Bin, Node, Split}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.storage.StorageLevel
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Node.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Node.scala
index ea6e5aa5d94e78f20d652d0f94e047c227640877..66f0908c1250f9642c787b6ac9f29d4c8f653fa6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Node.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Node.scala
@@ -17,10 +17,10 @@
package org.apache.spark.mllib.tree.model
-import org.apache.spark.annotation.{DeveloperApi, Since}
import org.apache.spark.Logging
-import org.apache.spark.mllib.tree.configuration.FeatureType._
+import org.apache.spark.annotation.{DeveloperApi, Since}
import org.apache.spark.mllib.linalg.Vector
+import org.apache.spark.mllib.tree.configuration.FeatureType._
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Split.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Split.scala
index b85a66c05a81d2e02c359e633828c74e2fa85422..783a4acb55ce9155fdf18decb55928ae30925cff 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Split.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/Split.scala
@@ -18,7 +18,6 @@
package org.apache.spark.mllib.tree.model
import org.apache.spark.annotation.{DeveloperApi, Since}
-import org.apache.spark.mllib.tree.configuration.FeatureType.FeatureType
import org.apache.spark.mllib.tree.configuration.FeatureType
import org.apache.spark.mllib.tree.configuration.FeatureType.FeatureType
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/util/LogisticRegressionDataGenerator.scala b/mllib/src/main/scala/org/apache/spark/mllib/util/LogisticRegressionDataGenerator.scala
index 33477ee20ebbde1613ec2f387ce75cd4b4eccaf2..68835bc79677f9f92d9c596e8a2659bcfc686235 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/util/LogisticRegressionDataGenerator.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/util/LogisticRegressionDataGenerator.scala
@@ -19,11 +19,11 @@ package org.apache.spark.mllib.util
import scala.util.Random
-import org.apache.spark.annotation.{Since, DeveloperApi}
import org.apache.spark.SparkContext
-import org.apache.spark.rdd.RDD
-import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.annotation.{DeveloperApi, Since}
import org.apache.spark.mllib.linalg.Vectors
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.rdd.RDD
/**
* :: DeveloperApi ::
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/util/MFDataGenerator.scala b/mllib/src/main/scala/org/apache/spark/mllib/util/MFDataGenerator.scala
index 906bd30563bd003485d3dc6197f99c5cb2ac5374..8af6750da4ff37c0ffb73bc20b68b3948e2da1ad 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/util/MFDataGenerator.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/util/MFDataGenerator.scala
@@ -23,7 +23,7 @@ import scala.language.postfixOps
import scala.util.Random
import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Since, DeveloperApi}
+import org.apache.spark.annotation.{DeveloperApi, Since}
import org.apache.spark.mllib.linalg.{BLAS, DenseMatrix}
import org.apache.spark.rdd.RDD
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala b/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
index 4c9151f0cb4fb28ba02fb6399b6b1ed3d7ec078e..89186de96988f4801858b5179f078d07a419c38e 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
@@ -19,15 +19,14 @@ package org.apache.spark.mllib.util
import scala.reflect.ClassTag
-import org.apache.spark.annotation.Since
import org.apache.spark.SparkContext
-import org.apache.spark.rdd.RDD
-import org.apache.spark.rdd.PartitionwiseSampledRDD
-import org.apache.spark.util.random.BernoulliCellSampler
-import org.apache.spark.mllib.regression.LabeledPoint
-import org.apache.spark.mllib.linalg.{SparseVector, DenseVector, Vector, Vectors}
+import org.apache.spark.annotation.Since
+import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
import org.apache.spark.mllib.linalg.BLAS.dot
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD}
import org.apache.spark.storage.StorageLevel
+import org.apache.spark.util.random.BernoulliCellSampler
/**
* Helper methods to load, save and pre-process data used in ML Lib.
diff --git a/scalastyle-config.xml b/scalastyle-config.xml
index 6925e18737b752260e94cb841710a086dd2e2f75..16d18b3328ff7f922ca4b7d964c855b6d239e902 100644
--- a/scalastyle-config.xml
+++ b/scalastyle-config.xml
@@ -219,8 +219,8 @@ This file is divided into 3 sections:
<check level="warning" class="org.scalastyle.scalariform.ImportOrderChecker" enabled="true">
<parameters>
<parameter name="groups">java,scala,3rdParty,spark</parameter>
- <parameter name="group.java">javax?\..+</parameter>
- <parameter name="group.scala">scala\..+</parameter>
+ <parameter name="group.java">javax?\..*</parameter>
+ <parameter name="group.scala">scala\..*</parameter>
<parameter name="group.3rdParty">(?!org\.apache\.spark\.).*</parameter>
<parameter name="group.spark">org\.apache\.spark\..*</parameter>
</parameters>