Source Home >> Java Source 1.6.0 >> java.lang.NullPointerException V 0.09

01/*
02 * @(#)NullPointerException.java	1.20 05/11/17
03 *
04 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
05 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
06 */
07
08package java.lang;
09
10/**
11 * Thrown when an application attempts to use <code>null</code> in a 
12 * case where an object is required. These include: 
13 * <ul>
14 * <li>Calling the instance method of a <code>null</code> object. 
15 * <li>Accessing or modifying the field of a <code>null</code> object. 
16 * <li>Taking the length of <code>null</code> as if it were an array. 
17 * <li>Accessing or modifying the slots of <code>null</code> as if it 
18 *     were an array. 
19 * <li>Throwing <code>null</code> as if it were a <code>Throwable</code> 
20 *     value. 
21 * </ul>
22 * <p>
23 * Applications should throw instances of this class to indicate 
24 * other illegal uses of the <code>null</code> object. 
25 *
26 * @author  unascribed
27 * @version 1.20, 11/17/05
28 * @since   JDK1.0
29 */
30public
31class NullPointerException extends RuntimeException {
32    /**
33     * Constructs a <code>NullPointerException</code> with no detail message.
34     */
35    public NullPointerException() {
36	super();
37    }
38
39    /**
40     * Constructs a <code>NullPointerException</code> with the specified 
41     * detail message. 
42     *
43     * @param   s   the detail message.
44     */
45    public NullPointerException(String s) {
46	super(s);
47    }
48}