78 lines
2.3 KiB
Java
78 lines
2.3 KiB
Java
/*
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* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4855355
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* @summary implement "foreach" loops as specified in JSR 201
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* @author gafter
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*/
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import java.util.Iterator;
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public class Foreach implements Iterable<Integer> {
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public Iterator<Integer> iterator() {
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return new Iterator<Integer>() {
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int next = 1;
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public boolean hasNext() {
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return next <= (1 << 12);
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}
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public void remove() {
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throw new UnsupportedOperationException();
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}
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public Integer next() {
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try {
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return new Integer(next);
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} finally {
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next <<= 1;
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}
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}
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};
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}
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public static void main(String[] args) {
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int sum;
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sum = 0;
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int[] a = new int[12];
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for (int i=0; i<12; i++) a[i] = 1<<i;
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for (int i : a) {
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if (i > 400) break;
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if (i == 16) continue;
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sum += i;
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}
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if (sum != 495)
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throw new AssertionError("cogito ergo " + sum);
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sum = 0;
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Iterable<Integer> x = new Foreach();
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for (Integer j : x)
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sum += j.intValue();
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if (sum != 8191)
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throw new AssertionError("cogito ergo " + sum);
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System.out.println("success!");
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}
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}
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