Issue apache#318 : minor style updates per review from Reynold Xin

Author: srowen

examples/src/main/java/org/apache/spark/examples/JavaHdfsLR.java

@@ -35,9 +35,6 @@ public final class JavaHdfsLR {
   private static final int D = 10;   // Number of dimensions
   private static final Random rand = new Random(42);
 
-  private JavaHdfsLR() {
-  }
-
   static class DataPoint implements Serializable {
     DataPoint(double[] x, double y) {
       this.x = x;
@@ -57,7 +54,7 @@ public DataPoint call(String line) {
       double y = Double.parseDouble(tok[0]);
       double[] x = new double[D];
       for (int i = 0; i < D; i++) {
-        x[i] = Double.parseDouble(tok[i+1]);
+        x[i] = Double.parseDouble(tok[i + 1]);
       }
       return new DataPoint(x, y);
     }

examples/src/main/java/org/apache/spark/examples/JavaKMeans.java

@@ -36,9 +36,6 @@ public final class JavaKMeans {
 
   private static final Pattern SPACE = Pattern.compile(" ");
 
-  private JavaKMeans() {
-  }
-
   /** Parses numbers split by whitespace to a vector */
   static Vector parseVector(String line) {
     String[] splits = SPACE.split(line);

examples/src/main/java/org/apache/spark/examples/JavaLogQuery.java

@@ -54,9 +54,6 @@ public final class JavaLogQuery {
   public static final Pattern apacheLogRegex = Pattern.compile(
     "^([\\d.]+) (\\S+) (\\S+) \\[([\\w\\d:/]+\\s[+\\-]\\d{4})\\] \"(.+?)\" (\\d{3}) ([\\d\\-]+) \"([^\"]+)\" \"([^\"]+)\".*");
 
-  private JavaLogQuery() {
-  }
-
   /** Tracks the total query count and number of aggregate bytes for a particular group. */
   public static class Stats implements Serializable {
 

examples/src/main/java/org/apache/spark/examples/JavaPageRank.java

@@ -17,7 +17,6 @@
 
 package org.apache.spark.examples;
 
-import org.apache.spark.SparkContext;
 import scala.Tuple2;
 import org.apache.spark.api.java.JavaPairRDD;
 import org.apache.spark.api.java.JavaRDD;
@@ -43,9 +42,6 @@
 public final class JavaPageRank {
   private static final Pattern SPACES = Pattern.compile("\\s+");
 
-  private JavaPageRank() {
-  }
-
   private static class Sum extends Function2<Double, Double, Double> {
     @Override
     public Double call(Double a, Double b) {

examples/src/main/java/org/apache/spark/examples/JavaSparkPi.java

@@ -28,9 +28,6 @@
 /** Computes an approximation to pi */
 public final class JavaSparkPi {
 
-  private JavaSparkPi() {
-  }
-
   public static void main(String[] args) throws Exception {
     if (args.length == 0) {
       System.err.println("Usage: JavaLogQuery <master> [slices]");

examples/src/main/java/org/apache/spark/examples/JavaTC.java

@@ -37,9 +37,6 @@ public final class JavaTC {
   private static final int numVertices = 100;
   private static final Random rand = new Random(42);
 
-  private JavaTC() {
-  }
-
   static List<Tuple2<Integer, Integer>> generateGraph() {
     Set<Tuple2<Integer, Integer>> edges = new HashSet<Tuple2<Integer, Integer>>(numEdges);
     while (edges.size() < numEdges) {

examples/src/main/java/org/apache/spark/examples/JavaWordCount.java

@@ -32,9 +32,6 @@
 public final class JavaWordCount {
   private static final Pattern SPACE = Pattern.compile(" ");
 
-  private JavaWordCount() {
-  }
-
   public static void main(String[] args) throws Exception {
     if (args.length < 2) {
       System.err.println("Usage: JavaWordCount <master> <file>");

examples/src/main/java/org/apache/spark/mllib/examples/JavaALS.java

@@ -33,10 +33,7 @@
 /**
  * Example using MLLib ALS from Java.
  */
-public final class  JavaALS {
-
-  private JavaALS() {
-  }
+public final class JavaALS {
 
   static class ParseRating extends Function<String, Rating> {
     private static final Pattern COMMA = Pattern.compile(",");

examples/src/main/java/org/apache/spark/mllib/examples/JavaKMeans.java

@@ -32,9 +32,6 @@
  */
 public final class JavaKMeans {
 
-  private JavaKMeans() {
-  }
-
   static class ParsePoint extends Function<String, double[]> {
     private static final Pattern SPACE = Pattern.compile(" ");
 

examples/src/main/java/org/apache/spark/mllib/examples/JavaLR.java

@@ -34,9 +34,6 @@
  */
 public final class JavaLR {
 
-  private JavaLR() {
-  }
-
   static class ParsePoint extends Function<String, LabeledPoint> {
     private static final Pattern COMMA = Pattern.compile(",");
     private static final Pattern SPACE = Pattern.compile(" ");