get Public InetAddress - Java Network

Java examples for Network:Network Address

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Description

get Public InetAddress

Demo Code

/*/*from www . j a  v  a2 s  .c  o m*/
 * Copyright (C) 2014~2016 dinstone<dinstone@163.com>
 *
 * 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.
 */
//package com.java2s;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.LinkedList;
import java.util.List;

public class Main {
    public static void main(String[] argv) throws Exception {
        System.out.println(getPublicInetInetAddress());
    }

    public static final List<InetAddress> getPublicInetInetAddress()
            throws SocketException {
        List<InetAddress> inetAddresses = new LinkedList<InetAddress>();
        for (Enumeration<NetworkInterface> e = NetworkInterface
                .getNetworkInterfaces(); e.hasMoreElements();) {
            NetworkInterface netInterface = e.nextElement();
            if (netInterface.isLoopback() || netInterface.isVirtual()
                    || !netInterface.isUp()) {
                continue;
            }

            for (InterfaceAddress address : netInterface
                    .getInterfaceAddresses()) {
                InetAddress inetAddress = address.getAddress();
                if (!inetAddress.isLoopbackAddress()
                        && !inetAddress.isLinkLocalAddress()
                        && !inetAddress.isSiteLocalAddress()
                        && (inetAddress instanceof Inet4Address)) {
                    inetAddresses.add(inetAddress);
                }
            }
        }

        return inetAddresses;
    }
}

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