1 /* 2 * Copyright (c) 2012, 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 import java.util.Objects; 25 import java.util.Comparators; 26 import sun.misc.JavaLangAccess; 27 import sun.misc.SharedSecrets; 28 29 /* 30 * @test 31 * @summary Test JavaLangAccess.newUnsafeString 32 * @bug 8013528 33 * @compile -XDignore.symbol.file NewUnsafeString.java 34 */ 35 public class NewUnsafeString { 36 37 static final JavaLangAccess jla = SharedSecrets.getJavaLangAccess(); 38 39 public static void testNewUnsafeString() { 40 String benchmark = "exemplar"; 41 String constructorCopy = new String(benchmark); 42 char[] jlaChars = benchmark.toCharArray(); 43 String jlaCopy = jla.newStringUnsafe(jlaChars); 44 45 if (benchmark == constructorCopy) { 46 throw new Error("should be different instances"); 47 } 48 if (!benchmark.equals(constructorCopy)) { 49 throw new Error("Copy not equal"); 50 } 51 if (0 != Objects.compare(benchmark, constructorCopy, Comparators.naturalOrder())) { 52 throw new Error("Copy not equal"); 53 } 54 55 if (benchmark == jlaCopy) { 56 throw new Error("should be different instances"); 57 } 58 if (!benchmark.equals(jlaCopy)) { 59 throw new Error("Copy not equal"); 60 } 61 if (0 != Objects.compare(benchmark, jlaCopy, Comparators.naturalOrder())) { 62 throw new Error("Copy not equal"); 63 } 64 65 if (constructorCopy == jlaCopy) { 66 throw new Error("should be different instances"); 67 } 68 if (!constructorCopy.equals(jlaCopy)) { 69 throw new Error("Copy not equal"); 70 } 71 if (0 != Objects.compare(constructorCopy, jlaCopy, Comparators.naturalOrder())) { 72 throw new Error("Copy not equal"); 73 } 74 75 // The following is extremely "evil". Never ever do this in non-test code. 76 jlaChars[0] = 'X'; 77 if (!"Xxemplar".equals(jlaCopy)) { 78 throw new Error("jla.newStringUnsafe did not use provided string"); 79 } 80 81 } 82 83 public static void main(String[] args) { 84 testNewUnsafeString(); 85 } 86 }