1 /* 2 * Copyright (c) 2013, 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 import java.util.Properties; 24 25 /* 26 * @test 27 * @bug 8022854 28 * @summary Test that System properties reinitialization returns consistent 29 * results. 30 * @author mduigou 31 * @run main/othervm PropertiesReinit 32 */ 33 public class PropertiesReinit { 34 public static void main(String... args) { 35 Properties first = System.getProperties(); 36 37 // Re-initialize (Why do we even have that lever?) 38 System.setProperties(null); 39 40 Properties second = System.getProperties(); 41 42 Properties diff1 = (Properties) first.clone(); 43 Properties diff2 = (Properties) second.clone(); 44 45 diff1.keySet().removeAll(second.keySet()); 46 diff2.keySet().removeAll(first.keySet()); 47 48 if(!diff1.isEmpty() || !diff2.isEmpty()) { 49 System.out.println("Appearing in second: " + diff2 ); 50 System.out.println("Missing from second: " + diff1 ); 51 52 throw new RuntimeException("re-inited properties differed"); 53 } 54 } 55 }