/*

 * Copyright (c) 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.

 *

 * 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     4533087

 * @summary Test to see if the main thread is in its thread group

 */

public class MainThreadTest {

    public static void main(String args[]) {

        ThreadGroup tg = Thread.currentThread().getThreadGroup();

        int n = tg.activeCount();

        Thread[] ts = new Thread[n];

        int m = tg.enumerate(ts);

        for (int i = 0; i < ts.length; i++) {

            if (Thread.currentThread() == ts[i]) {

                return;

            }

        }

        throw new RuntimeException(

            "Current thread is not in its own thread group!");

    }

}