duke@1: /*
duke@1:  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
duke@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1:  *
duke@1:  * This code is free software; you can redistribute it and/or modify it
duke@1:  * under the terms of the GNU General Public License version 2 only, as
duke@1:  * published by the Free Software Foundation.
duke@1:  *
duke@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@1:  * version 2 for more details (a copy is included in the LICENSE file that
duke@1:  * accompanied this code).
duke@1:  *
duke@1:  * You should have received a copy of the GNU General Public License version
duke@1:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1:  *
duke@1:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@1:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@1:  * have any questions.
duke@1:  */
duke@1: 
duke@1: /*
duke@1:  * @test
duke@1:  * @bug 4912795
duke@1:  * @summary AbstractMethodError throws if not redeclare abstract iterator() method
duke@1:  * @author gafter
duke@1:  *
duke@1:  * @compile -source 1.5 SuperfluousAbstract.java
duke@1:  * @run main SuperfluousAbstract
duke@1:  */
duke@1: 
duke@1: import java.util.AbstractCollection;
duke@1: import java.util.Collection;
duke@1: import java.util.Iterator;
duke@1: 
duke@1: interface Q<E> extends Collection<E> {}
duke@1: 
duke@1: abstract class AbstractQ<E> extends AbstractCollection<E> implements Q<E> {
duke@1:     // Uncomment this to avoid the AbstractMethodError:
duke@1:     //public abstract Iterator<E> iterator();
duke@1: }
duke@1: 
duke@1: class ConcreteQ<E> extends AbstractQ<E> {
duke@1:     public int size() { return 0; }
duke@1:     public Iterator<E> iterator() { return null; }
duke@1: }
duke@1: 
duke@1: public class SuperfluousAbstract {
duke@1:     public static void main(String[] args) {
duke@1:         try {
duke@1:             Q<Integer> q = new ConcreteQ<Integer>() ;
duke@1:             for (Integer i : q) {}
duke@1:         }
duke@1:         catch (AbstractMethodError e) {
duke@1:             e.printStackTrace(System.err);
duke@1:         }
duke@1:         catch (NullPointerException e) {
duke@1:             // expected, since iterator() returns null
duke@1:         }
duke@1:     }
duke@1: }