1 /*

     2  * Copyright 1994-1997 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * 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  * @since   JDK1.0

    46  */

    47 public

    48 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 }