aoqi@0: /*
aoqi@0:  * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 4912795
aoqi@0:  * @summary AbstractMethodError throws if not redeclare abstract iterator() method
aoqi@0:  * @author gafter
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.util.AbstractCollection;
aoqi@0: import java.util.Collection;
aoqi@0: import java.util.Iterator;
aoqi@0: 
aoqi@0: interface Q<E> extends Collection<E> {}
aoqi@0: 
aoqi@0: abstract class AbstractQ<E> extends AbstractCollection<E> implements Q<E> {
aoqi@0:     // Uncomment this to avoid the AbstractMethodError:
aoqi@0:     //public abstract Iterator<E> iterator();
aoqi@0: }
aoqi@0: 
aoqi@0: class ConcreteQ<E> extends AbstractQ<E> {
aoqi@0:     public int size() { return 0; }
aoqi@0:     public Iterator<E> iterator() { return null; }
aoqi@0: }
aoqi@0: 
aoqi@0: public class SuperfluousAbstract {
aoqi@0:     public static void main(String[] args) {
aoqi@0:         try {
aoqi@0:             Q<Integer> q = new ConcreteQ<Integer>() ;
aoqi@0:             for (Integer i : q) {}
aoqi@0:         }
aoqi@0:         catch (AbstractMethodError e) {
aoqi@0:             e.printStackTrace(System.err);
aoqi@0:         }
aoqi@0:         catch (NullPointerException e) {
aoqi@0:             // expected, since iterator() returns null
aoqi@0:         }
aoqi@0:     }
aoqi@0: }