1 /* 2 * Copyright (c) 2018, 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 8193524 27 * @summary Redefine a class' public static method that contains a lambda expression 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * @modules java.compiler 31 * java.instrument 32 * jdk.jartool/sun.tools.jar 33 * @run main RedefineClassHelper 34 * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineAddLambdaExpression 35 */ 36 37 interface MathOperation { 38 public int operation(int a, int b); 39 } 40 41 class B { 42 public static int operate(int a, int b, MathOperation mathOperation) { 43 return mathOperation.operation(a, b); 44 } 45 static int test_math(String p) { 46 MathOperation addition = (int a, int b) -> a + b; 47 return operate(10, 5, addition); 48 } 49 } 50 51 public class RedefineAddLambdaExpression { 52 53 public static String newB = 54 "class B {" + 55 " public static int operate(int a, int b, MathOperation mathOperation) {" + 56 " return mathOperation.operation(a, b);" + 57 " }" + 58 " static int test_math(String p) {" + 59 " MathOperation addition = (int a, int b) -> a + b;" + 60 " System.out.println(p + \" from class B's test_math method\");" + 61 " MathOperation subtraction = (int a, int b) -> a - b;" + 62 " return operate(10, 5, subtraction);" + 63 " }" + 64 "}"; 65 66 public static void main(String[] args) throws Exception { 67 int res = B.test_math("Hello"); 68 System.out.println("Result = " + res); 69 if (res != 15) { 70 throw new Error("test_math returned " + res + " expected " + 15); 71 } 72 RedefineClassHelper.redefineClass(B.class, newB); 73 74 res = B.test_math("Hello"); 75 if (res != 5) 76 throw new Error("test_math returned " + res + " expected " + 5); 77 } 78 }