test/java/net/URLClassLoader/GetURLsTest.java

/*
 * Copyright (c) 1998, 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.net.*;
import java.io.*;

/*
 * Regression test for URLClassLoader getURLs() and addURL() methods.
 * See RFE 4102580: Need URLClassLoader.getURLs() method
 */
class GetURLsTest {
    public static void main(String[] args) throws Exception {
        MyURLClassLoader ucl =
            new MyURLClassLoader(new URL[] { new File(".").toURL() });
        p("initial urls = ", ucl.getURLs());
        URL u = ucl.getResource("GetURLsTest.java");
        if (u != null) {
            p("found resource = " + u);
        }
        ucl.addURL(new File("jars", "class_path_test.jar").toURL());
        p("new urls = ", ucl.getURLs());
        Class c = ucl.loadClass("Foo");
        p("found class = " + c);
    }

    static class MyURLClassLoader extends URLClassLoader {
        public MyURLClassLoader(URL[] urls) {
            super(urls);
        }
        public void addURL(URL url) {
            super.addURL(url);
        }
    }

    static void p(String s, URL[] urls) {
        System.out.print(s);
        if (urls.length > 0) {
            for (int i = 0; i < urls.length - 1; i++) {
                System.out.print(urls[i] + " ");
            }
        }
        System.out.println(urls[urls.length - 1]);
    }

    static void p(String s) {
        System.out.println(s);
    }
}