56 lines
2.0 KiB
Java
56 lines
2.0 KiB
Java
/*
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* Copyright (c) 2003, 2020, 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 4329937
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* @summary Basic test for making Boolean implement Comparable
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* @author Josh Bloch
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* @key randomness
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*/
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import java.util.*;
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public class MakeBooleanComparable {
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public static void main(String[] args) {
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Random rnd = new Random();
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List<Boolean> list = new ArrayList<>();
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int numFalse = 0;
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for (int i = 0; i < 1000; i++) {
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boolean element = rnd.nextBoolean();
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if (!element)
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numFalse++;
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list.add(element); // Autoboxing!
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}
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Collections.sort(list);
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for (int i = 0; i < numFalse; i++)
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if (list.get(i).booleanValue()) // Autounboxing doesn't work yet!
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throw new RuntimeException("False positive: " + i);
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for (int i = numFalse; i < 1000; i++)
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if (!list.get(i).booleanValue()) // Autounboxing doesn't work yet!
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throw new RuntimeException("False negative: " + i);
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}
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}
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