--- old/src/java.desktop/share/classes/java/awt/image/PackedColorModel.java	2016-04-25 14:51:32.918914154 +0530
+++ new/src/java.desktop/share/classes/java/awt/image/PackedColorModel.java	2016-04-25 14:51:32.726818161 +0530
@@ -27,6 +27,7 @@
 
 import java.awt.Transparency;
 import java.awt.color.ColorSpace;
+import java.util.Arrays;
 
 /**
  * The {@code PackedColorModel} class is an abstract
@@ -393,16 +394,18 @@
      * is an instance of {@code PackedColorModel} and equals this
      * {@code PackedColorModel}; {@code false} otherwise.
      */
+    @Override
     public boolean equals(Object obj) {
-        if (!(obj instanceof PackedColorModel)) {
-            return false;
+
+        PackedColorModel cm = (PackedColorModel) obj;
+        if (this == cm) {
+            return true;
         }
 
         if (!super.equals(obj)) {
             return false;
         }
 
-        PackedColorModel cm = (PackedColorModel) obj;
         int numC = cm.getNumComponents();
         for(int i=0; i < numC; i++) {
             if (maskArray[i] != cm.getMask(i)) {
@@ -412,6 +415,19 @@
         return true;
     }
 
+    /**
+     * Returns the hash code for this PackedColorModel.
+     *
+     * @return    a hash code for this PackedColorModel.
+     */
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 89 * hash + super.hashCode();
+        hash = 89 * hash + Arrays.hashCode(this.maskArray);
+        return hash;
+    }
+
     private static final int[] createBitsArray(int[]colorMaskArray,
                                                int alphaMask) {
         int numColors = colorMaskArray.length;