Java example source code file (BadDottedIPAddress.java)

This example Java source code file (BadDottedIPAddress.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

baddottedipaddress, exception, inetaddress, net, network, string, unknownhostexception

The BadDottedIPAddress.java Java example source code

/*
 * Copyright (c) 2001, 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.
 */

/*
 * @test
 * @bug 4321350
 * @bug 4516522
 * @summary Check that InetAddress.getByName() throws UHE with dotted
 *          IP address with octets out of range (Windows specific bug)
 *         or when bad IPv6 Litterals addresses are passed.
 */
import java.net.InetAddress;
import java.net.UnknownHostException;

public class BadDottedIPAddress {

    public static void main(String args[]) throws Exception {

        String host = "999.999.999.999";

        boolean exc_thrown = false;
        try {
            InetAddress ia = InetAddress.getByName(host);
        } catch (UnknownHostException e) {
            exc_thrown = true;
        }

        if (!exc_thrown) {
            throw new Exception("UnknownHostException was not thrown for: "
                + host);
        }

        host = "[]";
        exc_thrown = false;
        try {
            InetAddress ia = InetAddress.getByName(host);
        } catch (UnknownHostException e) {
            exc_thrown = true;
        } catch (Exception e) {
        }

        if (!exc_thrown) {
            throw new Exception("UnknownHostException was not thrown for: "
                + host);
        }

        host = "[127.0.0.1]";
        exc_thrown = false;
        try {
            InetAddress ia = InetAddress.getByName(host);
        } catch (UnknownHostException e) {
            exc_thrown = true;
        } catch (Exception e) {
        }

        if (!exc_thrown) {
            throw new Exception("UnknownHostException was not thrown for: "
                + host);
        }

        host = "[localhost]";
        exc_thrown = false;
        try {
            InetAddress ia = InetAddress.getByName(host);
        } catch (UnknownHostException e) {
            exc_thrown = true;
        } catch (Exception e) {
        }

        if (!exc_thrown) {
            throw new Exception("UnknownHostException was not thrown for: "
                + host);
        }
    }
}