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Ping or Poll a Machine via Java Thread

                            Ping a machine from java program

package com.test.demo;

import java.util.Date;

public class PingTest implements Runnable {

        public static final int HOST_NOT_FOUND = 0;
        private static final int LOOKING_FOR_HOST = 1;
        public static final int CANNOT_CONNECT = 2;
        private static final int CONNECTING_TO_HOST = 3;
        public static final int SUCCESS = 4;

        private String hostname;
        private int port;
        private int status;

        private PingTest(String hostname, int port) {
                this.hostname = hostname;
                this.port = port;
        public void run() {
                try {
                Date dt1 = new Date();
                status = LOOKING_FOR_HOST;
                        InetAddress addr = InetAddress.getByName(hostname);
                        status = CONNECTING_TO_HOST;
                        Socket s = new Socket(addr, port);
                        status = SUCCESS;
                } catch (Exception e) {
                Date dt2 = new Date();

        public static int ping(String hostname, int port, long maxWait) {
                PingTest ping = new PingTest(hostname, port);
                try {
                        Thread t = new Thread(ping);
                        if (t.isAlive()) {
                        System.out.println("thread is alive");
                        } else {
                        System.out.println("thread finished");
                } catch (InterruptedException ie) {
                return ping.status;
       /* public static int ping(String hostname, int port, long maxWait) {
            PingTest ping = new PingTest(hostname, port);
            try {
                    Thread t = new Thread(ping);
            } catch (InterruptedException ie) {
            return ping.status;


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