import java.net.*;
import java.io.*;

public class ReachableNegHostTest {

    public static void main(String args[]) {

        if(args.length != 2) {
            System.out.println("Usage: java ReachableHostTest <hosts_1> <hosts_2>");
            System.exit(1);
        }

        InetAddress hostnames[] = new InetAddress[2];
        String tempStr = null;

        for(int i=0; i<2; i++) {
            try {
                tempStr = args[i];
                hostnames[i] = InetAddress.getByName(tempStr);
            } catch (UnknownHostException e) {
                System.err.println("UnknownHostException thrown. Test failed.");
                System.err.println("The unknown host is : " + tempStr);
                e.printStackTrace();
                System.exit(1);
            }
        }

        try {
            if(hostnames[0].isReachable(1) && hostnames[1].isReachable(1)) {
                System.out.println("FAILURE!! Both the hosts should not be reachable within 1 millisecond");
                System.exit(1);
            } else {
                System.out.println("Passed.");
            }
        } catch (IOException e) {
            System.err.println("IOException occured.");
            e.printStackTrace();
            System.exit(1);
        }
    }
}