1/*
2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 4855355
27 * @summary implement "foreach" loops as specified in JSR 201
28 * @author gafter
29 */
30
31import java.util.Iterator;
32
33public class Foreach implements Iterable<Integer> {
34
35    public Iterator<Integer> iterator() {
36        return new Iterator<Integer>() {
37            int next = 1;
38            public boolean hasNext() {
39                return next <= (1 << 12);
40            }
41            public void remove() {
42                throw new UnsupportedOperationException();
43            }
44            public Integer next() {
45                try {
46                    return new Integer(next);
47                } finally {
48                    next <<= 1;
49                }
50            }
51        };
52    }
53
54    public static void main(String[] args) {
55        int sum;
56
57        sum = 0;
58        int[] a = new int[12];
59        for (int i=0; i<12; i++) a[i] = 1<<i;
60        for (int i : a) {
61            if (i > 400) break;
62            if (i == 16) continue;
63            sum += i;
64        }
65        if (sum != 495)
66            throw new AssertionError("cogito ergo " + sum);
67
68        sum = 0;
69        Iterable<Integer> x = new Foreach();
70        for (Integer j : x)
71            sum += j.intValue();
72        if (sum != 8191)
73            throw new AssertionError("cogito ergo " + sum);
74
75        System.out.println("success!");
76    }
77}
78