1 /* 2 * Copyright (c) 2014, 2015, 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 * @library /testlibrary 27 * @summary Proof of concept test for RedefineClassHelper 28 * @modules java.base/jdk.internal.misc 29 * @modules java.compiler 30 * java.instrument 31 * jdk.jartool/sun.tools.jar 32 * @build RedefineClassHelper 33 * @run main RedefineClassHelper 34 * @run main/othervm -javaagent:redefineagent.jar RedefineClassTest 35 */ 36 37 import static jdk.test.lib.Asserts.*; 38 import jdk.test.lib.*; 39 40 /* 41 * Proof of concept test for the test utility class RedefineClassHelper 42 */ 43 public class RedefineClassTest { 44 45 public static String newClass = "class RedefineClassTest$A { public int Method() { return 2; } }"; 46 public static void main(String[] args) throws Exception { 47 A a = new A(); 48 assertTrue(a.Method() == 1); 49 RedefineClassHelper.redefineClass(A.class, newClass); 50 assertTrue(a.Method() == 2); 51 } 52 53 static class A { 54 public int Method() { 55 return 1; 56 } 57 } 58 }