src/java.desktop/share/classes/java/awt/image/ComponentColorModel.java

@@ -2925,24 +2925,40 @@
                                           raster.getHeight(), x, y,
                                           band);
     }
 
     /**
-     * Compares this color model with another for equality.
-     *
-     * @param obj The object to compare with this color model.
-     * @return {@code true} if the color model objects are equal,
-     * {@code false} if they are not.
+     * Tests if the specified {@code Object} is an instance
+     * of {@code ComponentColorModel} and equals this
+     * {@code ComponentColorModel}.
+     * @param obj the {@code Object} to test for equality
+     * @return {@code true} if the specified {@code Object}
+     * is an instance of {@code ComponentColorModel} and equals this
+     * {@code ComponentColorModel}; {@code false} otherwise.
      */
+    @Override
     public boolean equals(Object obj) {
-        if (!super.equals(obj)) {
-            return false;
+
+        ComponentColorModel cm = (ComponentColorModel) obj;
+        if (this == cm) {
+            return true;
         }
 
-        if (obj.getClass() !=  getClass()) {
+        if (!super.equals(obj)) {
             return false;
         }
-
         return true;
     }
 
+    /**
+     * Returns the hash code for this ComponentColorModel.
+     *
+     * @return    a hash code for this ComponentColorModel.
+     */
+    @Override
+    public int hashCode() {
+        int hash = 7;
+        hash = 79 * hash + super.hashCode();
+        return hash;
+    }
+
 }