Java Local Address Get getLocalAddress(String filter)

Description

get Local Address

License

Apache License

Declaration

public static String getLocalAddress(String filter) 

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;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
    public static String getLocalAddress(String filter) {
        if (filter == null) {
            InetAddress addr;//w  w  w  .jav a  2  s .com
            try {
                addr = InetAddress.getLocalHost();
                return addr.getHostAddress().toString();
            } catch (UnknownHostException e) {
                throw new RuntimeException("Failed to getLocalAddress", e);
            }
        }
        Pattern filterPattern = Pattern.compile(filter);
        try {
            Enumeration<NetworkInterface> networks = NetworkInterface.getNetworkInterfaces();
            while (networks.hasMoreElements()) {
                NetworkInterface network = networks.nextElement();
                Enumeration<InetAddress> addresses = network.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    String address = addresses.nextElement().getHostAddress();
                    Matcher m = filterPattern.matcher(address);
                    if (m.matches()) {
                        return address;
                    }
                }
            }
        } catch (SocketException e) {
            throw new RuntimeException("Failed to getLocalAddress", e);
        }
        throw new RuntimeException("Failed to getLocalAddress");
    }
}

Related

1. getLocalAddress(final String start, final String end)
2. getLocalAddress(int port)
3. getLocalAddress(int port)
4. getLocalAddress(int port)
5. getLocalAddress(String adaptorName)
6. getLocalAddress0()
7. getLocalAddressAsString()
8. getLocalAddresses()
9. getLocalAddresses()