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Java example source code file (TestUtil.java)
The TestUtil.java Java example source code/* * Copyright (c) 2000, 2012, 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 utilities * */ import java.io.*; import java.net.*; import java.nio.channels.*; import java.util.Random; public class TestUtil { // Test hosts used by the channels tests - change these when // executing in a different network. public static final String UNRESOLVABLE_HOST = "blah-blah.blah-blah.blah"; private TestUtil() { } // Repeatedly try random ports until we bind to one. You might be tempted // to do this: // // ServerSocketChannel ssc = ServerSocketChannel.open(); // ssc.socket().bind(new InetSocketAddress(0)); // SocketAddress sa = ssc.socket().getLocalSocketAddress(); // // but unfortunately it doesn't work on NT 4.0. // // Returns the bound port. // static int bind(ServerSocketChannel ssc) throws IOException { InetAddress lh = InetAddress.getLocalHost(); Random r = new Random(); for (;;) { int p = r.nextInt((1 << 16) - 1024) + 1024; InetSocketAddress isa = new InetSocketAddress(lh, p); try { ssc.socket().bind(isa); } catch (IOException x) { continue; } return p; } } // A more convenient form of bind(ServerSocketChannel) that returns a full // socket address. // static InetSocketAddress bindToRandomPort(ServerSocketChannel ssc) throws IOException { int p = bind(ssc); return new InetSocketAddress(InetAddress.getLocalHost(), p); } private static String osName = System.getProperty("os.name"); static boolean onSolaris() { return osName.startsWith("SunOS"); } static boolean onWindows() { return osName.startsWith("Windows"); } } Other Java examples (source code examples)Here is a short list of links related to this Java TestUtil.java source code file: |
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