diff -r 588d5bf7a560 -r aa70afac4eca rt/emul/compact/src/main/java/java/util/concurrent/atomic/AtomicReferenceArray.java
--- a/rt/emul/compact/src/main/java/java/util/concurrent/atomic/AtomicReferenceArray.java	Thu Oct 03 15:40:35 2013 +0200
+++ b/rt/emul/compact/src/main/java/java/util/concurrent/atomic/AtomicReferenceArray.java	Fri Oct 04 10:52:01 2013 +0200
@@ -34,8 +34,6 @@
  */
 
 package java.util.concurrent.atomic;
-import sun.misc.Unsafe;
-import java.util.*;
 
 /**
  * An array of object references in which elements may be updated
@@ -49,29 +47,8 @@
 public class AtomicReferenceArray<E> implements java.io.Serializable {
     private static final long serialVersionUID = -6209656149925076980L;
 
-    private static final Unsafe unsafe = Unsafe.getUnsafe();
-    private static final int base = unsafe.arrayBaseOffset(Object[].class);
-    private static final int shift;
     private final Object[] array;
 
-    static {
-        int scale = unsafe.arrayIndexScale(Object[].class);
-        if ((scale & (scale - 1)) != 0)
-            throw new Error("data type scale not a power of two");
-        shift = 31 - Integer.numberOfLeadingZeros(scale);
-    }
-
-    private long checkedByteOffset(int i) {
-        if (i < 0 || i >= array.length)
-            throw new IndexOutOfBoundsException("index " + i);
-
-        return byteOffset(i);
-    }
-
-    private static long byteOffset(int i) {
-        return ((long) i << shift) + base;
-    }
-
     /**
      * Creates a new AtomicReferenceArray of the given length, with all
      * elements initially null.
@@ -110,11 +87,7 @@
      * @return the current value
      */
     public final E get(int i) {
-        return getRaw(checkedByteOffset(i));
-    }
-
-    private E getRaw(long offset) {
-        return (E) unsafe.getObjectVolatile(array, offset);
+        return (E)array[i];
     }
 
     /**
@@ -124,7 +97,7 @@
      * @param newValue the new value
      */
     public final void set(int i, E newValue) {
-        unsafe.putObjectVolatile(array, checkedByteOffset(i), newValue);
+        array[i] = newValue;
     }
 
     /**
@@ -135,7 +108,7 @@
      * @since 1.6
      */
     public final void lazySet(int i, E newValue) {
-        unsafe.putOrderedObject(array, checkedByteOffset(i), newValue);
+        array[i] = newValue;
     }
 
 
@@ -148,12 +121,9 @@
      * @return the previous value
      */
     public final E getAndSet(int i, E newValue) {
-        long offset = checkedByteOffset(i);
-        while (true) {
-            E current = (E) getRaw(offset);
-            if (compareAndSetRaw(offset, current, newValue))
-                return current;
-        }
+        E v = (E)array[i];
+        array[i] = newValue;
+        return v;
     }
 
     /**
@@ -167,11 +137,12 @@
      * the actual value was not equal to the expected value.
      */
     public final boolean compareAndSet(int i, E expect, E update) {
-        return compareAndSetRaw(checkedByteOffset(i), expect, update);
-    }
-
-    private boolean compareAndSetRaw(long offset, E expect, E update) {
-        return unsafe.compareAndSwapObject(array, offset, expect, update);
+        if (array[i] == expect) {
+            array[i] = update;
+            return true;
+        } else {
+            return false;
+        }
     }
 
     /**
@@ -203,7 +174,7 @@
         StringBuilder b = new StringBuilder();
         b.append('[');
         for (int i = 0; ; i++) {
-            b.append(getRaw(byteOffset(i)));
+            b.append(get(i));
             if (i == iMax)
                 return b.append(']').toString();
             b.append(',').append(' ');