jdk/src/share/classes/java/lang/NullPointerException.java
author duke
Sat, 01 Dec 2007 00:00:00 +0000
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/*
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 * Copyright 1994-1997 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Sun designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Sun in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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package java.lang;
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/**
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 * Thrown when an application attempts to use <code>null</code> in a
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 * case where an object is required. These include:
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 * <ul>
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 * <li>Calling the instance method of a <code>null</code> object.
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 * <li>Accessing or modifying the field of a <code>null</code> object.
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 * <li>Taking the length of <code>null</code> as if it were an array.
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 * <li>Accessing or modifying the slots of <code>null</code> as if it
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 *     were an array.
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 * <li>Throwing <code>null</code> as if it were a <code>Throwable</code>
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 *     value.
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 * </ul>
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 * <p>
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 * Applications should throw instances of this class to indicate
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 * other illegal uses of the <code>null</code> object.
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 *
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 * @author  unascribed
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 * @since   JDK1.0
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 */
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public
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class NullPointerException extends RuntimeException {
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    /**
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     * Constructs a <code>NullPointerException</code> with no detail message.
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     */
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    public NullPointerException() {
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        super();
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    }
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    /**
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     * Constructs a <code>NullPointerException</code> with the specified
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     * detail message.
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     *
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     * @param   s   the detail message.
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     */
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    public NullPointerException(String s) {
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        super(s);
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    }
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}