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 }