/* * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ import java.io.File; import java.lang.reflect.Method; import java.net.URL; import java.net.URLClassLoader; public class CustomLoaderApp { private static String className = "LambHello"; public static void main(String args[]) throws Exception { String path = args[0]; URL url = new File(path).toURI().toURL(); URL[] urls = new URL[] {url}; System.out.println(path); System.out.println(url); URLClassLoader urlClassLoader = new URLClassLoader("HelloClassLoader", urls, null); Class c = Class.forName(className, true, urlClassLoader); System.out.println(c); System.out.println(c.getClassLoader()); Object o = c.newInstance(); if (c.getClassLoader() != urlClassLoader) { throw new RuntimeException("c.getClassLoader() == " + c.getClassLoader() + ", expected == " + urlClassLoader); } Method method = c.getDeclaredMethod("doTest"); method.invoke(o); } }