--- old/src/java.desktop/share/classes/javax/swing/DefaultListModel.java	2018-04-09 16:54:41.431753000 +0530
+++ new/src/java.desktop/share/classes/javax/swing/DefaultListModel.java	2018-04-09 16:54:39.093491700 +0530
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,10 +26,9 @@
 package javax.swing;
 
 import java.util.Vector;
+import java.util.Collection;
 import java.util.Enumeration;
 
-import javax.swing.event.*;
-
 
 /**
  * This class loosely implements the <code>java.util.Vector</code>
@@ -539,11 +538,44 @@
         fireIntervalRemoved(this, fromIndex, toIndex);
     }
 
-    /*
-    public void addAll(Collection c) {
+    /**
+     * Adds all of the elements present in the collection to the list.
+     * 
+     * @param c the collection which contains the elements to add.
+     */
+    public void addAll(Collection<E> c) {
+        if (c.isEmpty()) {
+            return;
+        }
+
+        int startIndex = getSize();
+
+        delegate.addAll(c);
+        fireIntervalAdded(this, startIndex, getSize() - 1);
     }
 
-    public void addAll(int index, Collection c) {
+    /**
+     * Adds all of the elements present in the collection, starting
+     * from the index specified.
+     * <p>
+     * Throws as <code>IllegalArgumentException</code> if the
+     * index is invalid.
+     * 
+     * @param index the index from which to start adding elements from.
+     * @param c the collection which contains the elements to add
+     * @exception IllegalArgumentException if <code>c</code> doesn't
+     * fall in the rang of the list.
+     */
+    public void addAll(int index, Collection<E> c) {
+        if (index < 0 || index > getSize()) {
+            throw new IllegalArgumentException(
+                "index number must be >=0 and <= number of elements in the list.");
+        }
+        if (c.isEmpty()) {
+            return;
+        }
+
+        delegate.addAll(index, c);
+        fireIntervalAdded(this, index, index + c.size() - 1);
     }
-    */
 }