1 /* 2 * Copyright (c) 2020, 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 import java.lang.invoke.MethodHandles; 26 import java.lang.invoke.MethodHandles.Lookup; 27 import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*; 28 import jdk.test.lib.compiler.InMemoryJavaCompiler; 29 import jdk.internal.misc.Unsafe; 30 31 public class LambdaProxyCallerIsHiddenApp { 32 33 static byte klassbuf[] = InMemoryJavaCompiler.compile("LambdaHello", 34 "public class LambdaHello { " + 35 " static Runnable run; " + 36 " static { " + 37 " run = LambdaHello::myrun; " + 38 " } " + 39 " static void myrun() { " + 40 " System.out.println(\"Hello\"); " + 41 " } " + 42 "} "); 43 44 public static void main(String args[]) throws Exception { 45 Lookup lookup = MethodHandles.lookup(); 46 System.out.println("lookup: " + lookup); 47 48 Class<?> hiddenClass = lookup.defineHiddenClass(klassbuf, true, NESTMATE, STRONG).lookupClass(); 49 System.out.println("hiddenClass: " + hiddenClass); 50 Object o = hiddenClass.newInstance(); 51 System.out.println("o: " + o); 52 } 53 }