1 /*

     2  * Copyright (c) 2015, 2017, 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.io.*;

    26 import java.net.*;

    27 import sun.hotspot.WhiteBox;

    28 

    29 public class Hello {

    30     public static void main(String args[]) throws Exception {

    31         String path = args[0];

    32         URL url = new File(path).toURI().toURL();

    33         URL[] urls = new URL[] {url};

    34         System.out.println(path);

    35         System.out.println(url);

    36 

    37         URLClassLoader urlClassLoader = new URLClassLoader(urls);

    38         Class c = urlClassLoader.loadClass("CustomLoadee");

    39         System.out.println(c);

    40         System.out.println(c.getClassLoader());

    41 

    42         // [1] Check that CustomLoadee is defined by the correct loader

    43         if (c.getClassLoader() != urlClassLoader) {

    44             throw new RuntimeException("c.getClassLoader() == " + c.getClassLoader() +

    45                                        ", expected == " + urlClassLoader);

    46         }

    47 

    48         // [2] Check that CustomLoadee is loaded from shared archive.

    49         WhiteBox wb = WhiteBox.getWhiteBox();

    50         if (wb.isSharedClass(Hello.class)) {

    51             if (!wb.isSharedClass(c)) {

    52                 throw new RuntimeException("wb.isSharedClass(c) should be true");

    53             }

    54         }

    55     }

    56 }