Java InetAddress Create getLocalInetAddress()

Description

Retrieve the first validated local ip address(the Public and LAN ip addresses are validated).

License

Apache License

Exception

Parameter	Description
SocketException	the socket exception

Return

the local address

Declaration

public static InetAddress getLocalInetAddress() throws SocketException 

Method Source Code

//package com.java2s;
/*/*from www.j a  va 2 s .c o  m*/
 * Copyright (c) 2017 Baidu, Inc. All Rights Reserve.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

public class Main {
    /**
     * Retrieve the first validated local ip address(the Public and LAN ip addresses are validated).
     *
     * @return the local address
     * @throws SocketException the socket exception
     */
    public static InetAddress getLocalInetAddress() throws SocketException {
        // enumerates all network interfaces
        Enumeration<NetworkInterface> enu = NetworkInterface.getNetworkInterfaces();

        while (enu.hasMoreElements()) {
            NetworkInterface ni = enu.nextElement();
            if (ni.isLoopback()) {
                continue;
            }

            Enumeration<InetAddress> addressEnumeration = ni.getInetAddresses();
            while (addressEnumeration.hasMoreElements()) {
                InetAddress address = addressEnumeration.nextElement();

                // ignores all invalidated addresses
                if (address.isLinkLocalAddress() || address.isLoopbackAddress() || address.isAnyLocalAddress()) {
                    continue;
                }

                return address;
            }
        }

        throw new RuntimeException("No validated local address!");
    }
}

Related

1. getIPAsString(InetAddress addr)
2. getIPv4LocalNetMask(InetAddress ip, int netPrefix)
3. getIPv6InetAddresses(NetworkInterface networkInterface)
4. getLocalInetAddress()
5. getLocalInetAddress()
6. getLocalInetAddress(String host)
7. getLocalInetAddress(String host)
8. getLocalInetAddresses()
9. getLocalInetAddresses()