Child.java

/*
 * Copyright (c) 2015, 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.MalformedURLException;
import java.net.URL;

public class Child {

    public static void main(String[] args) throws MalformedURLException {
        if (args.length != 1) {
            System.err.println("Usage: java Child <protocol>");
            return;
        }
        String protocol = args[0];
        URL url = new URL(protocol + "://");

        // toExternalForm should return the protocol string
        String s = url.toExternalForm();
        if (!s.equals(protocol)) {
            System.err.println("Expected url.toExternalForm to return "
                                       + protocol + ", but got: " + s);
            System.exit(1);
        }
    }
}