47 lines
1.6 KiB
Java
47 lines
1.6 KiB
Java
/*
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* Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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/* @test
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* @bug 4247236
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* @summary Ensure that reference objects with null referents can be enqueued
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*/
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import java.lang.ref.*;
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public class EnqueueNullRef {
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static void test(ReferenceQueue q, Reference r) {
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if (!r.enqueue())
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throw new RuntimeException("Enqueue operation failed");
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}
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public static void main(String[] args) {
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ReferenceQueue q = new ReferenceQueue();
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test(q, new WeakReference(null, q));
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test(q, new SoftReference(null, q));
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test(q, new PhantomReference(null, q));
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}
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}
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