--- a/test/jdk/java/util/concurrent/tck/ConcurrentHashMapTest.java	Tue Jan 16 18:24:32 2018 -0800
+++ b/test/jdk/java/util/concurrent/tck/ConcurrentHashMapTest.java	Tue Jan 16 18:28:39 2018 -0800
@@ -83,17 +83,12 @@
         return map;
     }
 
-    /** Re-implement Integer.compare for old java versions */
-    static int compare(int x, int y) {
-        return (x < y) ? -1 : (x > y) ? 1 : 0;
-    }
-
     // classes for testing Comparable fallbacks
     static class BI implements Comparable<BI> {
         private final int value;
         BI(int value) { this.value = value; }
         public int compareTo(BI other) {
-            return compare(value, other.value);
+            return Integer.compare(value, other.value);
         }
         public boolean equals(Object x) {
             return (x instanceof BI) && ((BI)x).value == value;
@@ -127,7 +122,7 @@
                     break;
             }
             if (r == 0)
-                r = compare(size(), other.size());
+                r = Integer.compare(size(), other.size());
             return r;
         }
         private static final long serialVersionUID = 0;
@@ -155,8 +150,7 @@
      */
     public void testComparableFamily() {
         int size = 500;         // makes measured test run time -> 60ms
-        ConcurrentHashMap<BI, Boolean> m =
-            new ConcurrentHashMap<BI, Boolean>();
+        ConcurrentHashMap<BI, Boolean> m = new ConcurrentHashMap<>();
         for (int i = 0; i < size; i++) {
             assertNull(m.put(new CI(i), true));
         }
@@ -172,13 +166,12 @@
      */
     public void testGenericComparable() {
         int size = 120;         // makes measured test run time -> 60ms
-        ConcurrentHashMap<Object, Boolean> m =
-            new ConcurrentHashMap<Object, Boolean>();
+        ConcurrentHashMap<Object, Boolean> m = new ConcurrentHashMap<>();
         for (int i = 0; i < size; i++) {
             BI bi = new BI(i);
             BS bs = new BS(String.valueOf(i));
-            LexicographicList<BI> bis = new LexicographicList<BI>(bi);
-            LexicographicList<BS> bss = new LexicographicList<BS>(bs);
+            LexicographicList<BI> bis = new LexicographicList<>(bi);
+            LexicographicList<BS> bss = new LexicographicList<>(bs);
             assertNull(m.putIfAbsent(bis, true));
             assertTrue(m.containsKey(bis));
             if (m.putIfAbsent(bss, true) == null)
@@ -197,14 +190,13 @@
      */
     public void testGenericComparable2() {
         int size = 500;         // makes measured test run time -> 60ms
-        ConcurrentHashMap<Object, Boolean> m =
-            new ConcurrentHashMap<Object, Boolean>();
+        ConcurrentHashMap<Object, Boolean> m = new ConcurrentHashMap<>();
         for (int i = 0; i < size; i++) {
             m.put(Collections.singletonList(new BI(i)), true);
         }
 
         for (int i = 0; i < size; i++) {
-            LexicographicList<BI> bis = new LexicographicList<BI>(new BI(i));
+            LexicographicList<BI> bis = new LexicographicList<>(new BI(i));
             assertTrue(m.containsKey(bis));
         }
     }
@@ -215,8 +207,7 @@
      */
     public void testMixedComparable() {
         int size = 1200;        // makes measured test run time -> 35ms
-        ConcurrentHashMap<Object, Object> map =
-            new ConcurrentHashMap<Object, Object>();
+        ConcurrentHashMap<Object, Object> map = new ConcurrentHashMap<>();
         Random rng = new Random();
         for (int i = 0; i < size; i++) {
             Object x;