151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/* 251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved. 351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is free software; you can redistribute it and/or modify it 651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * under the terms of the GNU General Public License version 2 only, as 751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * published by the Free Software Foundation. Oracle designates this 851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * particular file as subject to the "Classpath" exception as provided 951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * by Oracle in the LICENSE file that accompanied this code. 1051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * This code is distributed in the hope that it will be useful, but WITHOUT 1251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * version 2 for more details (a copy is included in the LICENSE file that 1551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * accompanied this code). 1651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 1751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * You should have received a copy of the GNU General Public License version 1851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2 along with this work; if not, write to the Free Software Foundation, 1951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 2151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * or visit www.oracle.com if you need additional information or have any 2351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * questions. 2451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 2551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipackage java.lang; 2751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 2851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski/** 2951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Thrown when an application attempts to use {@code null} in a 3051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * case where an object is required. These include: 3151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <ul> 3251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <li>Calling the instance method of a {@code null} object. 3351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <li>Accessing or modifying the field of a {@code null} object. 3451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <li>Taking the length of {@code null} as if it were an array. 3551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <li>Accessing or modifying the slots of {@code null} as if it 3651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * were an array. 3751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <li>Throwing {@code null} as if it were a {@code Throwable} 3851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * value. 3951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * </ul> 4051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * <p> 4151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Applications should throw instances of this class to indicate 4251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * other illegal uses of the {@code null} object. 4351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 4451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * {@code NullPointerException} objects may be constructed by the 4551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * virtual machine as if {@linkplain Throwable#Throwable(String, 4651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Throwable, boolean, boolean) suppression were disabled and/or the 4751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * stack trace was not writable}. 4851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 4951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @author unascribed 5051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @since JDK1.0 5151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskipublic 5351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebskiclass NullPointerException extends RuntimeException { 5451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski private static final long serialVersionUID = 5162710183389028792L; 5551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 5651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 5751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Constructs a {@code NullPointerException} with no detail message. 5851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 5951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public NullPointerException() { 6051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(); 6151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 6251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski 6351b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski /** 6451b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * Constructs a {@code NullPointerException} with the specified 6551b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * detail message. 6651b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * 6751b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski * @param s the detail message. 6851b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski */ 6951b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski public NullPointerException(String s) { 7051b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski super(s); 7151b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski } 7251b1b6997fd3f980076b8081f7f1165ccc2a4008Piotr Jastrzebski} 73