Index: java/util/TimeZone.java
===================================================================
RCS file: /cvsroot/classpath/classpath/java/util/TimeZone.java,v
retrieving revision 1.27
diff -u -r1.27 TimeZone.java
--- java/util/TimeZone.java	6 Nov 2004 23:24:36 -0000	1.27
+++ java/util/TimeZone.java	6 Jan 2005 11:37:43 -0000
@@ -989,9 +989,13 @@
    * Sets the identifier of this time zone. For instance, PST for
    * Pacific Standard Time.
    * @param id the new time zone ID.
+   * @throws NullPointerException if <code>id</code> is <code>null</code>
    */
   public void setID(String id)
   {
+    if (id == null)
+      throw new NullPointerException();
+    
     this.ID = id;
   }