openjdk源码
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/*
* Copyright (c) 2001, 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.
*
* 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.
*/
/*
* @test
*
* @bug 4408755
*
* @summary This tests wether it's possible to get some informations
* out of a closed socket. This is for backward compatibility purposes.
*/
import java.net.*;
public class TestClose {
public static void main(String[] args) throws Exception {
ServerSocket ss;
Socket s;
InetAddress ad1, ad2;
int port1, port2, serverport;
ss = new ServerSocket(0);
serverport = ss.getLocalPort();
s = new Socket("localhost", serverport);
s.close();
ss.close();
ad1 = ss.getInetAddress();
if (ad1 == null)
throw new RuntimeException("ServerSocket.getInetAddress() returned null");
port1 = ss.getLocalPort();
if (port1 != serverport)
throw new RuntimeException("ServerSocket.getLocalPort() returned the wrong value");
ad2 = s.getInetAddress();
if (ad2 == null)
throw new RuntimeException("Socket.getInetAddress() returned null");
port2 = s.getPort();
if (port2 != serverport)
throw new RuntimeException("Socket.getPort() returned wrong value");
ad2 = s.getLocalAddress();
if (ad2 == null)
throw new RuntimeException("Socket.getLocalAddress() returned null");
port2 = s.getLocalPort();
if (port2 == -1)
throw new RuntimeException("Socket.getLocalPort returned -1");
}
}