1 /* 2 * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24 /* 25 * @test 26 * @bug 4329937 27 * @summary Basic test for making Boolean implement Comparable 28 * @author Josh Bloch 29 * 30 * @compile -source 1.5 MakeBooleanComparable.java 31 * @run main MakeBooleanComparable 32 */ 33 34 import java.util.*; 35 36 public class MakeBooleanComparable { 37 public static void main(String args[]) { 38 Random rnd = new Random(); 39 List<Boolean> list = new ArrayList<Boolean>(); 40 int numFalse = 0; 41 for (int i = 0; i < 1000; i++) { 42 boolean element = rnd.nextBoolean(); 43 if (!element) 44 numFalse++; 45 list.add(element); // Autoboxing! 46 } 47 48 Collections.sort(list); 49 50 for (int i = 0; i < numFalse; i++) 51 if (list.get(i).booleanValue()) // Autounboxing doesn't work yet! 52 throw new RuntimeException("False positive: " + i); 53 for (int i = numFalse; i < 1000; i++) 54 if (!list.get(i).booleanValue()) // Autounboxing doesn't work yet! 55 throw new RuntimeException("False negative: " + i); 56 } 57 }