/[classpath]/classpath/java/lang/NullPointerException.java
ViewVC logotype

Diff of /classpath/java/lang/NullPointerException.java

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.7 by mark, Tue Jan 22 22:27:00 2002 UTC revision 1.8 by ericb, Sun Feb 24 04:25:16 2002 UTC
# Line 1  Line 1 
1  /* NullPointerException.java -- exception thrown when attempting to use null  /* NullPointerException.java -- thrown when using null instead of an object
2     where an object is required.     Copyright (C) 1998, 1999, 2001, 2002 Free Software Foundation, Inc.
    Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.  
3    
4  This file is part of GNU Classpath.  This file is part of GNU Classpath.
5    
# Line 8  GNU Classpath is free software; you can Line 7  GNU Classpath is free software; you can
7  it under the terms of the GNU General Public License as published by  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation; either version 2, or (at your option)  the Free Software Foundation; either version 2, or (at your option)
9  any later version.  any later version.
10    
11  GNU Classpath is distributed in the hope that it will be useful, but  GNU Classpath is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Line 39  exception statement from your version. * Line 38  exception statement from your version. *
38    
39  package java.lang;  package java.lang;
40    
 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3  
  * "The Java Language Specification", ISBN 0-201-63451-1  
  * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.  
  * Status:  Believed complete and correct.  
  */  
   
41  /**  /**
  * Exceptions may be thrown by one part of a Java program and caught  
  * by another in order to deal with exceptional conditions.    
42   * Thrown when attempting to use <code>null</code> where an object   * Thrown when attempting to use <code>null</code> where an object
43   * is required, such as when accessing an instance method of a null object.   * is required. The Virtual Machine automatically throws this exception
44     * for the following:<br><ul>
45     * <li>Calling an instance method on a null object</li>
46     * <li>Accessing or modifying a field of a null object</li>
47     * <li>Taking the array length of a null array</li>
48     * <li>Accessing or modifying the slots of a null array</li>
49     * <li>Throwing a null Throwable</li>
50     * <li>Synchronizing on a null object</li>
51     * </ul>
52     * <p>Applications should also throw NullPointerExceptions whenever
53     * <code>null</code> is an inappropriate parameter to a method.
54   *   *
  * @since JDK 1.0  
  *  
55   * @author Brian Jones   * @author Brian Jones
56   * @author Warren Levy <warrenl@cygnus.com>   * @author Warren Levy <warrenl@cygnus.com>
57   * @date September 18, 1998.   * @status updated to 1.4
58   */   */
59  public class NullPointerException extends RuntimeException  public class NullPointerException extends RuntimeException
60  {  {
61    static final long serialVersionUID = 5162710183389028792L;    /**
62       * Compatible with JDK 1.0+.
63       */
64      private static final long serialVersionUID = 5162710183389028792L;
65    
66    /**    /**
67     * Create an exception without a message.     * Create an exception without a message.
68     */     */
69    public NullPointerException()    public NullPointerException()
70      {    {
71        super();    }
     }  
72    
73    /**    /**
74     * Create an exception with a message.     * Create an exception with a message.
75       *
76       * @param s the message
77     */     */
78    public NullPointerException(String s)    public NullPointerException(String s)
79      {    {
80        super(s);      super(s);
81      }    }
82  }  }

Legend:
Removed from v.1.7  
changed lines
  Added in v.1.8

savannah-hackers-public@gnu.org
ViewVC Help
Powered by ViewVC 1.1.26