Mon, 21 Jan 2013 11:16:28 -0800
Merge
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 */
24 /*
25 * @test
26 * @bug 4855355
27 * @summary implement "foreach" loops as specified in JSR 201
28 * @author gafter
29 */
31 import java.util.Iterator;
33 public class Foreach implements Iterable<Integer> {
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 }
54 public static void main(String[] args) {
55 int sum;
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);
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);
75 System.out.println("success!");
76 }
77 }