JDK8/Java8源码在线阅读

/*
 * Copyright (c) 1996, 2003, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package java.rmi;

/**
 * A <code>RemoteException</code> is the common superclass for a number of
 * communication-related exceptions that may occur during the execution of a
 * remote method call.  Each method of a remote interface, an interface that
 * extends <code>java.rmi.Remote</code>, must list
 * <code>RemoteException</code> in its throws clause.
 *
 * <p>As of release 1.4, this exception has been retrofitted to conform to
 * the general purpose exception-chaining mechanism.  The "wrapped remote
 * exception" that may be provided at construction time and accessed via
 * the public {@link #detail} field is now known as the <i>cause</i>, and
 * may be accessed via the {@link Throwable#getCause()} method, as well as
 * the aforementioned "legacy field."
 *
 * <p>Invoking the method {@link Throwable#initCause(Throwable)} on an
 * instance of <code>RemoteException</code> always throws {@link
 * IllegalStateException}.
 *
 * @author  Ann Wollrath
 * @since   JDK1.1
 */
public class RemoteException extends java.io.IOException {

    /* indicate compatibility with JDK 1.1.x version of class */
    private static final long serialVersionUID = -5148567311918794206L;

    /**
     * The cause of the remote exception.
     *
     * <p>This field predates the general-purpose exception chaining facility.
     * The {@link Throwable#getCause()} method is now the preferred means of
     * obtaining this information.
     *
     * @serial
     */
    public Throwable detail;

    /**
     * Constructs a <code>RemoteException</code>.
     */
    public RemoteException() {
        initCause(null);  // Disallow subsequent initCause
    }

    /**
     * Constructs a <code>RemoteException</code> with the specified
     * detail message.
     *
     * @param s the detail message
     */
    public RemoteException(String s) {
        super(s);
        initCause(null);  // Disallow subsequent initCause
    }

    /**
     * Constructs a <code>RemoteException</code> with the specified detail
     * message and cause.  This constructor sets the {@link #detail}
     * field to the specified <code>Throwable</code>.
     *
     * @param s the detail message
     * @param cause the cause
     */
    public RemoteException(String s, Throwable cause) {
        super(s);
        initCause(null);  // Disallow subsequent initCause
        detail = cause;
    }

    /**
     * Returns the detail message, including the message from the cause, if
     * any, of this exception.
     *
     * @return the detail message
     */
    public String getMessage() {
        if (detail == null) {

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