01 /*
02 * Copyright 1994-1997 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.lang;
27
28 /**
29 * Thrown when an application attempts to use <code>null</code> in a
30 * case where an object is required. These include:
31 * <ul>
32 * <li>Calling the instance method of a <code>null</code> object.
33 * <li>Accessing or modifying the field of a <code>null</code> object.
34 * <li>Taking the length of <code>null</code> as if it were an array.
35 * <li>Accessing or modifying the slots of <code>null</code> as if it
36 * were an array.
37 * <li>Throwing <code>null</code> as if it were a <code>Throwable</code>
38 * value.
39 * </ul>
40 * <p>
41 * Applications should throw instances of this class to indicate
42 * other illegal uses of the <code>null</code> object.
43 *
44 * @author unascribed
45 * @version 1.26, 05/05/07
46 * @since JDK1.0
47 */
48 public class NullPointerException extends RuntimeException {
49 /**
50 * Constructs a <code>NullPointerException</code> with no detail message.
51 */
52 public NullPointerException() {
53 super ();
54 }
55
56 /**
57 * Constructs a <code>NullPointerException</code> with the specified
58 * detail message.
59 *
60 * @param s the detail message.
61 */
62 public NullPointerException(String s) {
63 super(s);
64 }
65 }
|