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test/jdk/java/util/Arrays/Sorting.java

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@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -22,41 +22,47 @@
  */
 
 /*
  * @test
  * @bug 6880672 6896573 6899694 6976036 7013585 7018258
- * @summary Exercise Arrays.sort
  * @build Sorting
  * @run main Sorting -shortrun
+ * @summary Exercise Arrays.sort
  *
  * @author Vladimir Yaroslavskiy
  * @author Jon Bentley
  * @author Josh Bloch
  */
 
+import java.io.PrintStream;
 import java.util.Arrays;
 import java.util.Random;
-import java.io.PrintStream;
+import java.util.Comparator;
 
 public class Sorting {
+
     private static final PrintStream out = System.out;
     private static final PrintStream err = System.err;
 
     // Array lengths used in a long run (default)
     private static final int[] LONG_RUN_LENGTHS = {
         1, 2, 3, 5, 8, 13, 21, 34, 55, 100, 1000, 10000, 100000, 1000000 };
 
     // Array lengths used in a short run
     private static final int[] SHORT_RUN_LENGTHS = {
-        1, 2, 3, 21, 55, 1000, 10000 };
+        1, 2, 3, 21, 55, 1000, 10000, 12000 };
 
     // Random initial values used in a long run (default)
     private static final long[] LONG_RUN_RANDOMS = { 666, 0xC0FFEE, 999 };
 
     // Random initial values used in a short run
     private static final long[] SHORT_RUN_RANDOMS = { 666 };
 
+    // Constant values used in subarray sorting
+    private static final int A380 = 0xA380;
+    private static final int B747 = 0xB747;
+
     public static void main(String[] args) {
         boolean shortRun = args.length > 0 && args[0].equals("-shortrun");
         long start = System.currentTimeMillis();
 
         if (shortRun) {

@@ -77,11 +83,11 @@
         testEmptyAndNullByteArray();
         testEmptyAndNullFloatArray();
         testEmptyAndNullDoubleArray();
 
         for (int length : lengths) {
-            testMergeSort(length);
+            testMergingSort(length);
             testAndCheckRange(length);
             testAndCheckSubArray(length);
         }
         for (long seed : randoms) {
             for (int length : lengths) {

@@ -281,10 +287,19 @@
             ", length = " + length);
         Arrays.sort(a);
         checkSorted(a);
         checkStable(a);
         out.println();
+
+        a = build(length, random);
+
+        out.println("Test 'stable' comparator: " + "random = " + random.getSeed() +
+            ", length = " + length);
+        Arrays.sort(a, pairComparator);
+        checkSorted(a);
+        checkStable(a);
+        out.println();
     }
 
     private static void checkSorted(Pair[] a) {
         for (int i = 0; i < a.length - 1; i++) {
             if (a[i].getKey() > a[i + 1].getKey()) {

@@ -327,10 +342,16 @@
             a[i++] = new Pair(key, 4);
         }
         return a;
     }
 
+    private static Comparator<Pair> pairComparator = new Comparator<Pair>() {
+        public int compare(Pair p1, Pair p2) {
+            return p1.compareTo(p2);
+        }
+    };
+
     private static final class Pair implements Comparable<Pair> {
         Pair(int key, int value) {
             myKey = key;
             myValue = value;
         }

@@ -389,25 +410,25 @@
             }
         }
         out.println();
     }
 
-    private static void testMergeSort(int length) {
+    private static void testMergingSort(int length) {
         if (length < 1000) {
             return;
         }
-        ourDescription = "Check merge sorting";
+        ourDescription = "Check merging sort";
         int[] golden = new int[length];
-        int period = 67; // java.util.DualPivotQuicksort.MAX_RUN_COUNT
+        final int period = 50;
 
         for (int m = period - 2; m <= period + 2; m++) {
-            for (MergeBuilder builder : MergeBuilder.values()) {
+            for (MergingBuilder builder : MergingBuilder.values()) {
                 builder.build(golden, m);
                 int[] test = golden.clone();
 
                 for (TypeConverter converter : TypeConverter.values()) {
-                    out.println("Test 'merge sort': " + converter + " " +
+                    out.println("Test 'merging sort': " + converter + " " +
                         builder + "length = " + length + ", m = " + m);
                     Object convertedGolden = converter.convert(golden);
                     sort(convertedGolden);
                     checkSorted(convertedGolden);
                 }

@@ -467,22 +488,19 @@
     }
 
     private static void testAndCheckFloat(int length, MyRandom random) {
         ourDescription = "Check float sorting";
         float[] golden = new float[length];
-        final int MAX = 10;
         boolean newLine = false;
+        final int MAX = 12;
 
         for (int a = 0; a <= MAX; a++) {
             for (int g = 0; g <= MAX; g++) {
                 for (int z = 0; z <= MAX; z++) {
                     for (int n = 0; n <= MAX; n++) {
                         for (int p = 0; p <= MAX; p++) {
-                            if (a + g + z + n + p > length) {
-                                continue;
-                            }
-                            if (a + g + z + n + p < length) {
+                            if (a + g + z + n + p != length) {
                                 continue;
                             }
                             for (FloatBuilder builder : FloatBuilder.values()) {
                                 out.println("Test 'float': random = " + random.getSeed() +
                                    ", length = " + length + ", a = " + a + ", g = " +

@@ -542,11 +560,11 @@
         }
     }
 
     private static void prepareSubArray(int[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            a[i] = 0xDEDA;
+            a[i] = A380;
         }
         int middle = (fromIndex + toIndex) >>> 1;
         int k = 0;
 
         for (int i = fromIndex; i < middle; i++) {

@@ -554,11 +572,11 @@
         }
         for (int i = middle; i < toIndex; i++) {
             a[i] = k--;
         }
         for (int i = toIndex; i < a.length; i++) {
-            a[i] = 0xBABA;
+            a[i] = B747;
         }
     }
 
     private static void scramble(int[] a, Random random) {
         for (int i = 0; i < a.length * 7; i++) {

@@ -665,19 +683,20 @@
         INTEGER {
             Object convert(int[] a) {
                 Integer[] b = new Integer[a.length];
 
                 for (int i = 0; i < a.length; i++) {
-                    b[i] = new Integer(a[i]);
+                    b[i] = Integer.valueOf(a[i]);
                 }
                 return b;
             }
         };
 
         abstract Object convert(int[] a);
 
-        @Override public String toString() {
+        @Override
+        public String toString() {
             String name = name();
 
             for (int i = name.length(); i < 9; i++) {
                 name += " ";
             }

@@ -826,21 +845,22 @@
             }
         };
 
         abstract void build(int[] a, int m);
 
-        @Override public String toString() {
+        @Override
+        public String toString() {
             String name = name();
 
             for (int i = name.length(); i < 12; i++) {
                 name += " ";
             }
             return name;
         }
     }
 
-    private static enum MergeBuilder {
+    private static enum MergingBuilder {
         ASCENDING {
             void build(int[] a, int m) {
                 int period = a.length / m;
                 int v = 1, i = 0;
 

@@ -870,24 +890,74 @@
                 for (int j = i; j < a.length - 1; j++) {
                     a[j] = v--;
                 }
                 a[a.length - 1] = 0;
             }
+        },
+        POINT {
+            void build(int[] a, int m) {
+                for (int i = 0; i < a.length; i++) {
+                    a[i] = 0;
+                }
+                a[a.length / 2] = m;
+            }
+        },
+        LINE {
+            void build(int[] a, int m) {
+                for (int i = 0; i < a.length; i++) {
+                    a[i] = i;
+                }
+                reverse(a, 0, a.length - 1);
+            }
+        },
+        PEARL {
+            void build(int[] a, int m) {
+                for (int i = 0; i < a.length; i++) {
+                    a[i] = i;
+                }
+                reverse(a, 0, 2);
+            }
+        },
+        RING {
+            void build(int[] a, int m) {
+                int k1 = a.length / 3;
+                int k2 = a.length / 3 * 2;
+                int level = a.length / 3;
+
+                for (int i = 0, k = level; i < k1; i++) {
+                    a[i] = k--;
+                }
+                for (int i = k1; i < k2; i++) {
+                    a[i] = 0;
+                }
+                for (int i = k2, k = level; i < a.length; i++) {
+                    a[i] = k--;
+                }
+            }
         };
 
         abstract void build(int[] a, int m);
 
-        @Override public String toString() {
+        @Override
+        public String toString() {
             String name = name();
 
             for (int i = name.length(); i < 12; i++) {
                 name += " ";
             }
             return name;
         }
     }
 
+    private static void reverse(int[] a, int lo, int hi) {
+        for (--hi; lo < hi; ) {
+            int tmp = a[lo];
+            a[lo++] = a[hi];
+            a[hi--] = tmp;
+        }
+    }
+
     private static enum UnsortedBuilder {
         RANDOM {
             void build(int[] a, int m, Random random) {
                 for (int i = 0; i < a.length; i++) {
                     a[i] = random.nextInt();

@@ -990,11 +1060,12 @@
             }
         };
 
         abstract void build(int[] a, int m, Random random);
 
-        @Override public String toString() {
+        @Override
+        public String toString() {
             String name = name();
 
             for (int i = name.length(); i < 12; i++) {
                 name += " ";
             }

@@ -1037,11 +1108,11 @@
         } else if (test instanceof double[]) {
             compare((double[]) test, (double[]) golden);
         } else if (test instanceof Integer[]) {
             compare((Integer[]) test, (Integer[]) golden);
         } else {
-            failed("Unknow type of array: " + test + " of class " +
+            failed("Unknown type of array: " + test + " of class " +
                 test.getClass().getName());
         }
     }
 
     private static void compare(int[] a, int[] b) {

@@ -1124,11 +1195,11 @@
         } else if (object instanceof double[]) {
             checkSorted((double[]) object);
         } else if (object instanceof Integer[]) {
             checkSorted((Integer[]) object);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void checkSorted(int[] a) {

@@ -1220,11 +1291,11 @@
         } else if (object instanceof double[]) {
             return checkSumXor((double[]) object);
         } else if (object instanceof Integer[]) {
             return checkSumXor((Integer[]) object);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
             return -1;
         }
     }
 

@@ -1316,11 +1387,11 @@
         } else if (object instanceof double[]) {
             return checkSumPlus((double[]) object);
         } else if (object instanceof Integer[]) {
             return checkSumPlus((Integer[]) object);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
             return -1;
         }
     }
 

@@ -1412,11 +1483,11 @@
         } else if (object instanceof double[]) {
             sortByInsertionSort((double[]) object);
         } else if (object instanceof Integer[]) {
             sortByInsertionSort((Integer[]) object);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void sortByInsertionSort(int[] a) {

@@ -1515,11 +1586,11 @@
         } else if (object instanceof double[]) {
             Arrays.sort((double[]) object);
         } else if (object instanceof Integer[]) {
             Arrays.sort((Integer[]) object);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void sortSubArray(Object object, int fromIndex, int toIndex) {

@@ -1538,11 +1609,11 @@
         } else if (object instanceof double[]) {
             Arrays.sort((double[]) object, fromIndex, toIndex);
         } else if (object instanceof Integer[]) {
             Arrays.sort((Integer[]) object, fromIndex, toIndex);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void checkSubArray(Object object, int fromIndex, int toIndex, int m) {

@@ -1561,187 +1632,187 @@
         } else if (object instanceof double[]) {
             checkSubArray((double[]) object, fromIndex, toIndex, m);
         } else if (object instanceof Integer[]) {
             checkSubArray((Integer[]) object, fromIndex, toIndex, m);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void checkSubArray(Integer[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i].intValue() != 0xDEDA) {
+            if (a[i].intValue() != A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i].intValue() > a[i + 1].intValue()) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i].intValue() != 0xBABA) {
+            if (a[i].intValue() != B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(int[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != 0xDEDA) {
+            if (a[i] != A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != 0xBABA) {
+            if (a[i] != B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(byte[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (byte) 0xDEDA) {
+            if (a[i] != (byte) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (byte) 0xBABA) {
+            if (a[i] != (byte) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(long[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (long) 0xDEDA) {
+            if (a[i] != (long) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (long) 0xBABA) {
+            if (a[i] != (long) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(char[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (char) 0xDEDA) {
+            if (a[i] != (char) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (char) 0xBABA) {
+            if (a[i] != (char) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(short[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (short) 0xDEDA) {
+            if (a[i] != (short) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (short) 0xBABA) {
+            if (a[i] != (short) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(float[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (float) 0xDEDA) {
+            if (a[i] != (float) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (float) 0xBABA) {
+            if (a[i] != (float) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkSubArray(double[] a, int fromIndex, int toIndex, int m) {
         for (int i = 0; i < fromIndex; i++) {
-            if (a[i] != (double) 0xDEDA) {
+            if (a[i] != (double) A380) {
                 failed("Range sort changes left element on position " + i +
-                    ": " + a[i] + ", must be " + 0xDEDA);
+                    ": " + a[i] + ", must be " + A380);
             }
         }
 
         for (int i = fromIndex; i < toIndex - 1; i++) {
             if (a[i] > a[i + 1]) {
                 failedSort(i, "" + a[i], "" + a[i + 1]);
             }
         }
 
         for (int i = toIndex; i < a.length; i++) {
-            if (a[i] != (double) 0xBABA) {
+            if (a[i] != (double) B747) {
                 failed("Range sort changes right element on position " + i +
-                    ": " + a[i] + ", must be " + 0xBABA);
+                    ": " + a[i] + ", must be " + B747);
             }
         }
     }
 
     private static void checkRange(Object object, int m) {

@@ -1760,35 +1831,35 @@
         } else if (object instanceof double[]) {
             checkRange((double[]) object, m);
         } else if (object instanceof Integer[]) {
             checkRange((Integer[]) object, m);
         } else {
-            failed("Unknow type of array: " + object + " of class " +
+            failed("Unknown type of array: " + object + " of class " +
                 object.getClass().getName());
         }
     }
 
     private static void checkRange(Integer[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1798,26 +1869,26 @@
 
     private static void checkRange(int[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1827,26 +1898,26 @@
 
     private static void checkRange(long[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1856,26 +1927,26 @@
 
     private static void checkRange(byte[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1885,26 +1956,26 @@
 
     private static void checkRange(short[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1914,26 +1985,26 @@
 
     private static void checkRange(char[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1943,26 +2014,26 @@
 
     private static void checkRange(float[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }

@@ -1972,26 +2043,26 @@
 
     private static void checkRange(double[] a, int m) {
         try {
             Arrays.sort(a, m + 1, m);
 
-            failed("Sort does not throw IllegalArgumentException " +
+            failed("Arrays.sort does not throw IllegalArgumentException " +
                 " as expected: fromIndex = " + (m + 1) +
                 " toIndex = " + m);
         }
         catch (IllegalArgumentException iae) {
             try {
                 Arrays.sort(a, -m, a.length);
 
-                failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                     " as expected: fromIndex = " + (-m));
             }
             catch (ArrayIndexOutOfBoundsException aoe) {
                 try {
                     Arrays.sort(a, 0, a.length + m);
 
-                    failed("Sort does not throw ArrayIndexOutOfBoundsException " +
+                    failed("Arrays.sort does not throw ArrayIndexOutOfBoundsException " +
                         " as expected: toIndex = " + (a.length + m));
                 }
                 catch (ArrayIndexOutOfBoundsException aie) {
                     return;
                 }
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