《移动Agent技术》一书的所有章节源代码。

源代码在线查看: nullpointerexception.java

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				/*
				 * @(#)NullPointerException.java	1.11 97/01/20
				 * 
				 * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
				 * 
				 * This software is the confidential and proprietary information of Sun
				 * Microsystems, Inc. ("Confidential Information").  You shall not
				 * disclose such Confidential Information and shall use it only in
				 * accordance with the terms of the license agreement you entered into
				 * with Sun.
				 * 
				 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
				 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
				 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
				 * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
				 * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
				 * THIS SOFTWARE OR ITS DERIVATIVES.
				 * 
				 * CopyrightVersion 1.1_beta
				 * 
				 */
				
				package java.lang;
				
				/**
				 * Thrown when an application attempts to use null in a 
				 * case where an object is required. These include: 
				 * 
				 * Calling the instance method of a null object. 
				 * Accessing or modifying the field of a null object. 
				 * Taking the length of null as if it were an array. 
				 * Accessing or modifying the slots of null as if it 
				 *     were an array. 
				 * Throwing null as if it were a Throwable 
				 *     value. 
				 * 
				 * 
				 * Applications should throw instances of this class to indicate 
				 * other illegal uses of the null object. 
				 *
				 * @author  unascribed
				 * @version 1.11, 01/20/97
				 * @since   JDK1.0
				 */
				public
				class NullPointerException extends RuntimeException {
				    /**
				     * Constructs a NullPointerException with no detail message.
				     *
				     * @since   JDK1.0
				     */
				    public NullPointerException() {
					super();
				    }
				
				    /**
				     * Constructs a NullPointerException with the specified 
				     * detail message. 
				     *
				     * @param   s   the detail message.
				     * @since   JDK1.0
				     */
				    public NullPointerException(String s) {
					super(s);
				    }
				}
							

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