Java InetAddress checkConnection(InetAddress address, int port, int timeout)

Description

check Connection

License

Open Source License

Declaration

public static boolean checkConnection(InetAddress address, int port, int timeout) 

Method Source Code

//package com.java2s;
/* KIARA - Middleware for efficient and QoS/Security-aware invocation of services and exchange of messages
 *
 * Copyright (C) 2014 German Research Center for Artificial Intelligence (DFKI)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *///from  w  w  w  .  java2s .c  om

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class Main {
    public static boolean checkConnection(InetAddress address, int port, int timeout) {
        System.out.println("Checking connection...");
        boolean connected = false;
        long currentTime, startTime;
        currentTime = startTime = System.currentTimeMillis();
        while (!connected && ((currentTime - startTime) < timeout)) {
            try {
                Socket s = new Socket(address, port);
                connected = s.isConnected();
                s.close();
            } catch (IOException ex) {
                //ex.printStackTrace();
            }
        }
        System.out.println(connected ? "Connection detected" : "No Connection !");
        return connected;
    }

    public static boolean checkConnection(int port, int timeout) {
        try {
            return checkConnection(InetAddress.getLocalHost(), port, timeout);
        } catch (UnknownHostException ex) {
            return false;
        }
    }
}

Related

1. canonicalIpAddress(InetAddress addr)
2. compareAddresses(InetAddress one, InetAddress two)
3. compareInetAddresses(InetAddress a, InetAddress b)
4. compareInetAddresses(InetAddress a1, InetAddress a2)
5. CompareIP(InetAddress ip1, InetAddress ip2)