Java Local Host Get getLocalHost()

Description

Smarter way to get localhost than InetAddress.getLocalHost.

License

Apache License

Declaration

private static InetAddress getLocalHost() throws UnknownHostException, SocketException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

public class Main {
    /**/*  w  ww  . ja  v  a  2  s .c  o  m*/
     * Smarter way to get localhost than InetAddress.getLocalHost.  See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4665037
     */
    private static InetAddress getLocalHost() throws UnknownHostException, SocketException {
        // Windows Vista returns the IPv6 InetAddress using this method, which is not
        // particularly useful as it has no name or useful address, just "0:0:0:0:0:0:0:1".
        // That is why windows should be treated differently to linux/unix and use the
        // default way of getting the localhost.
        String osName = System.getProperty("os.name");
        if (osName != null && osName.toLowerCase().contains("windows")) {
            return InetAddress.getLocalHost();
        }

        InetAddress loopback = null;
        Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
        while (e.hasMoreElements()) {
            NetworkInterface i = e.nextElement();
            if (i.isUp() && !i.isPointToPoint()) {
                Enumeration<InetAddress> ie = i.getInetAddresses();
                while (ie.hasMoreElements()) {
                    InetAddress lch = ie.nextElement();
                    if (lch.isLoopbackAddress()) {
                        loopback = lch;
                    } else if (!lch.isLinkLocalAddress()) {
                        return lch;
                    }
                }
            }
        }
        return loopback;
    }
}

Related

1. getLocalHost()
2. getLocalHost()
3. getLocalHost()
4. getLocalHost()
5. getLocalHost()
6. getLocalHost()
7. getLocalHost()
8. getLocalHostAddress()
9. getLocalHostAddress()