EnqueueNullRef.java revision 0
7302N/A/*
7302N/A * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
7302N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
7302N/A *
7302N/A * This code is free software; you can redistribute it and/or modify it
7302N/A * under the terms of the GNU General Public License version 2 only, as
7302N/A * published by the Free Software Foundation.
7302N/A *
7302N/A * This code is distributed in the hope that it will be useful, but WITHOUT
7302N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
7302N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
7302N/A * version 2 for more details (a copy is included in the LICENSE file that
7302N/A * accompanied this code).
7302N/A *
7302N/A * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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*/
/* @test
* @bug 4247236
* @summary Ensure that reference objects with null referents can be enqueued
*/
import java.lang.ref.*;
public class EnqueueNullRef {
static void test(ReferenceQueue q, Reference r) {
if (!r.enqueue())
throw new RuntimeException("Enqueue operation failed");
}
public static void main(String[] args) {
ReferenceQueue q = new ReferenceQueue();
test(q, new WeakReference(null, q));
test(q, new SoftReference(null, q));
test(q, new PhantomReference(null, q));
}
}