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 }