Java IP Address Get getLocalIp(final boolean useIpv6)

Description

get Local Ip

License

Apache License

Declaration

public static String getLocalIp(final boolean useIpv6) 

Method Source Code

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

import java.net.*;
import java.util.ArrayList;
import java.util.Collections;

public class Main {
    public static String getLocalIp(final String interfaceName, final boolean useIpv6) {
        try {/* w  ww  .ja v  a  2s.co  m*/
            final NetworkInterface netInterface = NetworkInterface.getByName(interfaceName);
            final ArrayList<InetAddress> addresses = Collections.list(netInterface.getInetAddresses());

            for (final InetAddress address : addresses) {
                if (address instanceof Inet4Address && !useIpv6) {
                    return address.getHostAddress();
                } else if (address instanceof Inet6Address && useIpv6) {
                    return address.getHostAddress();
                }
            }
        } catch (final SocketException e) {
            throw new IllegalStateException(e);
        }
        throw new IllegalStateException("no suitable local address found");
    }

    public static String getLocalIp(final boolean useIpv6) {
        try {
            final ArrayList<NetworkInterface> networkInterfaces = Collections
                    .list(NetworkInterface.getNetworkInterfaces());
            for (final NetworkInterface netInterface : networkInterfaces) {
                if (!netInterface.isLoopback() && !netInterface.isPointToPoint()) {
                    final ArrayList<InetAddress> addresses = Collections.list(netInterface.getInetAddresses());
                    for (final InetAddress address : addresses) {
                        if (address instanceof Inet4Address && !useIpv6) {
                            return address.getHostAddress();
                        } else if (address instanceof Inet6Address && useIpv6) {
                            return address.getHostAddress();
                        }
                    }
                }
            }
        } catch (final SocketException e) {
            throw new IllegalStateException(e);
        }
        throw new IllegalStateException("no suitable local address found");
    }
}

Related

1. getLocalIp()
2. getLocalIP()
3. getLocalIp()
4. getLocalIP()
5. getLocalIp()
6. getLocalIPAddress()
7. getLocalIPAddress()
8. getLocalIpAddress()
9. getLocalIPAddress()