App.java

import java.net.InetAddress;
import java.net.InetSocketAddress;

public class App
{
    public static void main( String[] args )
    {
        if (args.length < 2) {
            System.err.println("pass in host and port (number)");
            System.exit(-1);
        }
        while (true) {
            try {
                InetSocketAddress inetSocketAddress = new InetSocketAddress(args[0], Integer.parseInt(args[1]));
                System.out.println(inetSocketAddress.getAddress().getHostAddress());
            } catch (Throwable e) {
                e.printStackTrace();
            }
            try {
                Thread.sleep(1000);
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
    }
}