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 import java.io.File;
  25 import java.lang.reflect.Method;
  26 import java.net.URL;
  27 import java.net.URLClassLoader;
  28 
  29 public class CustomLoaderApp {
  30     private static String className = "LambHello";
  31 
  32     public static void main(String args[]) throws Exception {
  33         String path = args[0];
  34         URL url = new File(path).toURI().toURL();
  35         URL[] urls = new URL[] {url};
  36         System.out.println(path);
  37         System.out.println(url);
  38 
  39         URLClassLoader urlClassLoader =
  40             new URLClassLoader("HelloClassLoader", urls, null);
  41         Class c = Class.forName(className, true, urlClassLoader);
  42         System.out.println(c);
  43         System.out.println(c.getClassLoader());
  44         Object o = c.newInstance();
  45 
  46         if (c.getClassLoader() != urlClassLoader) {
  47             throw new RuntimeException("c.getClassLoader() == " + c.getClassLoader() +
  48                                        ", expected == " + urlClassLoader);
  49         }
  50 
  51         Method method = c.getDeclaredMethod("doTest");
  52         method.invoke(o);
  53     }
  54 }