Lookup.java

/*
 * Copyright (c) 2002, 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.
 */

/*
 *
 *
 * Lookup/reverse lookup class for regression test 4773521 - see
 * lookup.sh for details.
 */
import java.net.InetAddress;
import java.net.UnknownHostException;

public class Lookup {
    public static void main(String args[]) throws UnknownHostException {

        // reverse lookup

        if (args[0].equals("-q=PTR")) {
            InetAddress ia = InetAddress.getByName(args[1]);
            System.out.println(ia.getHostName());
            return;
        }

        // lookup address

        String addr;
        if (args[0].equals("-q=A")) {
            addr = args[1];
        } else {
            addr = args[0];
        }
        InetAddress ia = InetAddress.getByName(args[1]);
        System.out.println(ia.getHostAddress());
    }

}