Exception
/* * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package java.lang; /** * The class {@code Exception} and its subclasses are a form of * {@code Throwable} that indicates conditions that a reasonable * application might want to catch. * * <p>The class {@code Exception} and any subclasses that are not also * subclasses of {@link RuntimeException} are <em>checked * exceptions</em>. Checked exceptions need to be declared in a * method or constructor's {@code throws} clause if they can be thrown * by the execution of the method or constructor and propagate outside * the method or constructor boundary. * * @author Frank Yellin * @see java.lang.Error * @jls 11.2 Compile-Time Checking of Exceptions * @since JDK1.0 */ public class Exception extends Throwable { static final long serialVersionUID = -3387516993124229948L; /** * Constructs a new exception with {@code null} as its detail message. * The cause is not initialized, and may subsequently be initialized by a * call to {@link #initCause}. */ public Exception() { super(); } /** * Constructs a new exception with the specified detail message. The * cause is not initialized, and may subsequently be initialized by * a call to {@link #initCause}. * * @param message the detail message. The detail message is saved for * later retrieval by the {@link #getMessage()} method. */ public Exception(String message) { super(message); } /** * Constructs a new exception with the specified detail message and * cause. <p>Note that the detail message associated with * {@code cause} is <i>not</i> automatically incorporated in * this exception's detail message. * * @param message the detail message (which is saved for later retrieval * by the {@link #getMessage()} method). * @param cause the cause (which is saved for later retrieval by the * {@link #getCause()} method). (A <tt>null</tt> value is * permitted, and indicates that the cause is nonexistent or * unknown.) * @since 1.4 */ public Exception(String message, Throwable cause) { super(message, cause); } /** * Constructs a new exception with the specified cause and a detail * message of <tt>(cause==null ? null : cause.toString())</tt> (which * typically contains the class and detail message of <tt>cause</tt>). * This constructor is useful for exceptions that are little more than * wrappers for other throwables (for example, {@link * java.security.PrivilegedActionException}). * * @param cause the cause (which is saved for later retrieval by the * {@link #getCause()} method). (A <tt>null</tt> value is * permitted, and indicates that the cause is nonexistent or * unknown.) * @since 1.4 */ public Exception(Throwable cause) { super(cause); } /** * Constructs a new exception with the specified detail message, * cause, suppression enabled or disabled, and writable stack * trace enabled or disabled. * * @param message the detail message. * @param cause the cause. (A {@code null} value is permitted, * and indicates that the cause is nonexistent or unknown.) * @param enableSuppression whether or not suppression is enabled * or disabled * @param writableStackTrace whether or not the stack trace should * be writable * @since 1.7 */ protected Exception(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }
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原文地址:http://www.cnblogs.com/herd/p/16268350.html
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