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Java example source code file (Suspend.java)
The Suspend.java Java example source code/* * Copyright (c) 1999, 2013, 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 4176355 7181748 * @summary Suspending a ThreadGroup that contains the current thread has * unpredictable results. */ public class Suspend implements Runnable { private static volatile int count = 0; private static final ThreadGroup group = new ThreadGroup(""); private static final Thread first = new Thread(group, new Suspend()); private static final Thread second = new Thread(group, new Suspend()); public void run() { while (true) { try { Thread.sleep(100); if (Thread.currentThread() == first) { if (second.isAlive()) { group.suspend(); } } else { count++; } } catch (InterruptedException e) { } } } public static void main(String[] args) throws Exception { // Launch two threads as part of the same thread group first.start(); second.start(); // Wait for the thread group suspend to be issued while (!first.isAlive() || !second.isAlive()) { Thread.sleep(100); } Thread.sleep(1000); // Suppose, the thread group is now suspended count = 0; Thread.sleep(1000); // Increment of the count indicates that the second thread is still running boolean failed = (count > 1); first.stop(); second.stop(); if (failed) { throw new RuntimeException("Failure."); } } } Other Java examples (source code examples)Here is a short list of links related to this Java Suspend.java source code file: |
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