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 4329937 27 * @summary Basic test for making Boolean implement Comparable 28 * @author Josh Bloch 29 * @key randomness 30 */ 31 32 import java.util.*; 33 34 public class MakeBooleanComparable { 35 public static void main(String args[]) { 36 Random rnd = new Random(); 37 List<Boolean> list = new ArrayList<Boolean>(); 38 int numFalse = 0; 39 for (int i = 0; i < 1000; i++) { 40 boolean element = rnd.nextBoolean(); 41 if (!element) 42 numFalse++; 43 list.add(element); // Autoboxing! 44 } 45 46 Collections.sort(list); 47 48 for (int i = 0; i < numFalse; i++) 49 if (list.get(i).booleanValue()) // Autounboxing doesn't work yet! 50 throw new RuntimeException("False positive: " + i); 51 for (int i = numFalse; i < 1000; i++) 52 if (!list.get(i).booleanValue()) // Autounboxing doesn't work yet! 53 throw new RuntimeException("False negative: " + i); 54 } 55 }