duke@1: /*
ohair@554:  * Copyright (c) 2003, Oracle and/or its affiliates. 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:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
duke@1:  */
duke@1: 
duke@1: /*
duke@1:  * @test
duke@1:  * @bug 4855355
duke@1:  * @summary implement "foreach" loops as specified in JSR 201
duke@1:  * @author gafter
duke@1:  */
duke@1: 
duke@1: import java.util.Iterator;
duke@1: 
duke@1: public class Foreach implements Iterable<Integer> {
duke@1: 
duke@1:     public Iterator<Integer> iterator() {
duke@1:         return new Iterator<Integer>() {
duke@1:             int next = 1;
duke@1:             public boolean hasNext() {
duke@1:                 return next <= (1 << 12);
duke@1:             }
duke@1:             public void remove() {
duke@1:                 throw new UnsupportedOperationException();
duke@1:             }
duke@1:             public Integer next() {
duke@1:                 try {
duke@1:                     return new Integer(next);
duke@1:                 } finally {
duke@1:                     next <<= 1;
duke@1:                 }
duke@1:             }
duke@1:         };
duke@1:     }
duke@1: 
duke@1:     public static void main(String[] args) {
duke@1:         int sum;
duke@1: 
duke@1:         sum = 0;
duke@1:         int[] a = new int[12];
duke@1:         for (int i=0; i<12; i++) a[i] = 1<<i;
duke@1:         for (int i : a) {
duke@1:             if (i > 400) break;
duke@1:             if (i == 16) continue;
duke@1:             sum += i;
duke@1:         }
duke@1:         if (sum != 495)
duke@1:             throw new AssertionError("cogito ergo " + sum);
duke@1: 
duke@1:         sum = 0;
duke@1:         Iterable<Integer> x = new Foreach();
duke@1:         for (Integer j : x)
duke@1:             sum += j.intValue();
duke@1:         if (sum != 8191)
duke@1:             throw new AssertionError("cogito ergo " + sum);
duke@1: 
duke@1:         System.out.println("success!");
duke@1:     }
duke@1: }