--- old/src/share/classes/java/lang/Double.java	2011-09-20 12:56:31.000000000 -0700
+++ new/src/share/classes/java/lang/Double.java	2011-09-20 12:56:31.000000000 -0700
@@ -123,6 +123,13 @@
     public static final int SIZE = 64;
 
     /**
+     * The number of bytes used to represent a {@code double} value.
+     *
+     * @since 1.8
+     */
+    public static final int BYTES = SIZE / Byte.SIZE;
+
+    /**
      * The {@code Class} instance representing the primitive type
      * {@code double}.
      *
@@ -730,6 +737,19 @@
         long bits = doubleToLongBits(value);
         return (int)(bits ^ (bits >>> 32));
     }
+
+    /**
+     * Returns a hash code for a {@code double} value; compatible with
+     * {@code Double.hashCode()}.
+     *
+     * @since 1.8
+     *
+     * @return a hash code value for a {@code double} value.
+     */
+    public static int hashCode(double value) {
+        long bits = doubleToLongBits(value);
+        return (int)(bits ^ (bits >>> 32));
+    }
 
     /**
      * Compares this object against the specified object.  The result