API additions for compatibility with harmony's java.util package

classpath/java/util/Collections.java

@@ -11,6 +11,7 @@
 package java.util;
 
 public class Collections {
+
   private Collections() { }
 
   public static void shuffle(List list, Random random) {
@@ -84,6 +85,10 @@ public class Collections {
     return new IteratorEnumeration<T> (c.iterator());
   }
 
+  public static <T> Comparator<T> reverseOrder(Comparator<T> cmp) {
+    return new ReverseComparator<T>(cmp);
+  }
+  
   static class IteratorEnumeration<T> implements Enumeration<T> {
     private final Iterator<T> it;
 
@@ -379,4 +384,20 @@ public class Collections {
       it.remove();
     }
   }
+  
+  private static final class ReverseComparator<T> implements Comparator<T> {
+
+    Comparator<T> cmp;
+    
+    public ReverseComparator(Comparator<T> cmp) {
+      this.cmp = cmp;
+    }
+    
+    @Override
+    public int compare(T o1, T o2) {
+      return - cmp.compare(o1, o2);
+    }
+
+  }
+
 }