public void requestX11Forwarding(String hostname, int port, byte[] cookie, boolean singleConnection)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;

public class Basic extends Thread
{
    static Connection conn;
    static Session sess;
    public static void main(String[] args)
    {
        String hostname = "192.168.XXX.XX";
        String username = "XXX";
        String password = "XXX";

        try
        {

            conn= new Connection(hostname);
            conn.connect();
            boolean isAuthenticated = conn.authenticateWithPassword(username, password);

            if (isAuthenticated == false)
                throw new IOException("Authentication failed.");

            /* Create a session */

            sess= conn.openSession();
            sess.requestX11Forwarding("192.168.XXX.XX",6012,null,true);
            System.out.println("Here is some information about the remote host:");

          sess.execCommand("firefox");
            /*
             * This basic example does not handle stderr, which is sometimes dangerous
             * (please read the FAQ).
             */

            InputStream stdout = new StreamGobbler(sess.getStdout());

            BufferedReader br = new BufferedReader(new InputStreamReader(stdout));

            while (true)
            {
                String line = br.readLine();
                if (line == null)
                    break;
                System.out.println(line);
            }

            /* Show exit status, if available (otherwise "null") */

            System.out.println("ExitCode: " + sess.getExitStatus());

            /* Close this session */

            sess.close();

            /* Close the connection */

            conn.close();

        }
        catch (IOException e)
        {
            e.printStackTrace(System.err);
            System.exit(2);
        }
    }
}