/* NullPointerException.java -- thrown when using null instead of an object Copyright (C) 1998, 1999, 2001, 2002, 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package java.lang; /** * Thrown when attempting to use <code>null</code> where an object * is required. The Virtual Machine automatically throws this exception * for the following:<br><ul> * <li>Calling an instance method on a null object</li> * <li>Accessing or modifying a field of a null object</li> * <li>Taking the array length of a null array</li> * <li>Accessing or modifying the slots of a null array</li> * <li>Throwing a null Throwable</li> * <li>Synchronizing on a null object</li> * </ul> * <p>Applications should also throw NullPointerExceptions whenever * <code>null</code> is an inappropriate parameter to a method. * * @author Brian Jones * @author Warren Levy (warrenl@cygnus.com) * @status updated to 1.4 */ public class NullPointerException extends RuntimeException { /** * Compatible with JDK 1.0+. */ private static final long serialVersionUID = 5162710183389028792L; /** * Create an exception without a message. */ public NullPointerException() { } /** * Create an exception with a message. * * @param s the message */ public NullPointerException(String s) { super(s); } }