Java Local Host Get isLocalhost(String hostname)

Description

Check if a hostname is the local host.

License

Open Source License

Parameter

Parameter	Description
hostname	Name of the host (may be an address).

Return

Localhost (true), or not (false).

Declaration

public static boolean isLocalhost(String hostname) 

Method Source Code

//package com.java2s;
/* ************************************************************************* *
 *                                                                           *
 *        Copyright (c) 2004 Peter Cappello  <cappello@cs.ucsb.edu>          *
 *                                                                           *
 *    Permission is hereby granted, free of charge, to any person obtaining  *
 *  a copy of this software and associated documentation files (the          *
 *  "Software"), to deal in the Software without restriction, including      *
 *  without limitation the rights to use, copy, modify, merge, publish,      *
 *  distribute, sublicense, and/or sell copies of the Software, and to       *
 *  permit persons to whom the Software is furnished to do so, subject to    *
 *  the following conditions:                                                *
 *                                                                           *
 *    The above copyright notice and this permission notice shall be         *
 *  included in all copies or substantial portions of the Software.          *
 *                                                                           *
 *    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        *
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF       *
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 *  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY     *
 *  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,     *
 *  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE        *
 *  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                   *
 *                                                                           *
 * ************************************************************************* */

import java.net.InetAddress;

public class Main {
    /**//from  w  w w .  ja  v  a2  s .  co  m
     * Check if a hostname is the local host.
     * 
     * @param hostname  Name of the host (may be an address).
     * @return Localhost (<CODE>true</CODE>), or not (<CODE>false</CODE>). 
     */
    public static boolean isLocalhost(String hostname) {
        assert null != hostname : "hostname to check cannot be null!";

        boolean isLocalhost = false;

        try {
            InetAddress remoteHost = InetAddress.getByName(hostname);
            InetAddress localHost = InetAddress.getLocalHost();
            InetAddress loopback = InetAddress.getByAddress(new byte[] { 127, 0, 0, 1 });

            if (remoteHost.equals(localHost) || remoteHost.equals(loopback)) {
                isLocalhost = true;
            }
        } catch (Exception anyException) {
        }

        return (isLocalhost);
    }
}

Related

1. getLocalHostNames()
2. getLocalHosts()
3. isLocalHost(String address)
4. isLocalHost(String h1)
5. isLocalhost(String host)
6. isLocalhost(String someHost)
7. isLocalHostNameInList(String[] hostList)