diff -r 2ca1bb929895 -r 4b334950499d emul/src/main/java/java/lang/AbstractStringBuilder.java
--- a/emul/src/main/java/java/lang/AbstractStringBuilder.java	Sat Sep 29 07:49:34 2012 +0200
+++ b/emul/src/main/java/java/lang/AbstractStringBuilder.java	Sat Sep 29 08:13:32 2012 +0200
@@ -124,7 +124,7 @@
                 throw new OutOfMemoryError();
             newCapacity = Integer.MAX_VALUE;
         }
-        value = copyOf(value, newCapacity);
+        value = String.copyOf(value, newCapacity);
     }
 
     /**
@@ -136,7 +136,7 @@
      */
     public void trimToSize() {
         if (count < value.length) {
-            value = copyOf(value, count);
+            value = String.copyOf(value, count);
         }
     }
 
@@ -1399,10 +1399,4 @@
         return value;
     }
 
-    private static char[] copyOf(char[] original, int newLength) {
-        char[] copy = new char[newLength];
-        System.arraycopy(original, 0, copy, 0,
-            Math.min(original.length, newLength));
-        return copy;
-    }
 }