Wsrtjtyk

I am looking for a way to make the code that I wrote in Java work to soon develop an interface for the drone tello.
I have this java code:

package conexion;



import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.InetSocketAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.UnknownHostException;



import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;



public class Tello3 extends JFrame implements ActionListener, KeyListener, Runnable {

    private static final long serialVersionUID = 1L;



    private JLabel l1;

    private JButton b1;

    private JTextField tf1;



    public Tello3() {

        this.setLayout(null);

        this.setTitle("Prueba 3");



        //Panel - Panel

        JPanel p = new JPanel();

        p.setBounds(0, 0, 300, 150);

        p.setLayout(null);

        add(p);



        //Textfield - Campo de texto

        tf1 = new JTextField();

        tf1.setBounds(10, 10, 280, 20);

        tf1.addKeyListener(this);

        tf1.setFocusable(true);

        p.add(tf1);



        //Labels - Etiquetas

        l1 = new JLabel();

        l1.setBounds(10, 50, 280, 20);

        p.add(l1);



        //Buttons - Botones

        b1 = new JButton("Send");

        b1.setBounds(80, 80, 140, 20);

        b1.addActionListener(this);

        b1.setFocusable(false);

        p.add(b1);



        Thread t = new Thread(this);

        t.start();

    }



    public void Action() {

        String command = tf1.getText();

        try {

            Socket s = new Socket("192.168.10.1", 8889);

            DataOutputStream dos = new DataOutputStream(s.getOutputStream());

            dos.writeUTF(command);

            dos.close();

            if(command == "end") {

                s.close();

            }

        } catch (UnknownHostException e) {

            JOptionPane.showMessageDialog(null, e.getMessage(), "Error3", 1);

        } catch (IOException e) {

            JOptionPane.showMessageDialog(null, e.getMessage(), "Error4", 1);

        }

    }



    @Override

    public void run() {

        // TODO Auto-generated method stub

        try {

            Socket s = new Socket();

            s.bind(new InetSocketAddress("", 9000));

            //s.connect(new InetSocketAddress("", 9000));

        } catch (IOException e) {

            // TODO Auto-generated catch block

            JOptionPane.showMessageDialog(null, e.getMessage(), "Error1", 1);

        }

        try {

            ServerSocket ss = new ServerSocket(1518);

            while(true) {

                Socket s = ss.accept();

                DataInputStream dis = new DataInputStream(s.getInputStream());

                String returned = dis.readUTF();

                l1.setText(returned);

                dis.close();

                if(returned == "end") {

                    ss.close();

                }

            }

        } catch (IOException e1) {

            JOptionPane.showMessageDialog(null, e1.getMessage(), "Error2", 1);

        }

    }



    @Override

    public void keyPressed(KeyEvent arg0) {

        // TODO Auto-generated method stub

        if(arg0.getKeyCode() == 10) {

            Action();

        }

    }



    @Override

    public void keyReleased(KeyEvent arg0) {

        // TODO Auto-generated method stub



    }



    @Override

    public void keyTyped(KeyEvent arg0) {

        // TODO Auto-generated method stub



    }



    @Override

    public void actionPerformed(ActionEvent arg0) {

        // TODO Auto-generated method stub

        Action();

    }



    public static void main(String arg0) {

        JFrame form_tello = new Tello3();

        form_tello.setSize(300, 150);

        form_tello.setLocationRelativeTo(null);

        form_tello.setResizable(false);

        form_tello.setVisible(true);

        form_tello.setDefaultCloseOperation(EXIT_ON_CLOSE);

    }



}

When I execute that just show a error 1 message with the bind, but I don't know if the rest of methods works.
The next code was written on python and works. It's officially from DJI.

#

# Tello Python3 Control Demo 

#

# http://www.ryzerobotics.com/

#

# 1/1/2018



import threading 

import socket

import sys

import time





host = ''

port = 9000

locaddr = (host,port) 





# Create a UDP socket

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)



tello_address = ('192.168.10.1', 8889)



sock.bind(locaddr)



def recv():

    count = 0

    while True: 

        try:

            data, server = sock.recvfrom(1518)

            print(data.decode(encoding="utf-8"))

        except Exception:

            print ('nExit . . .n')

            break





print ('rnrnTello Python3 Demo.rn')



print ('Tello: command takeoff land flip forward back left right rn       up down cw ccw speed speed?rn')



print ('end -- quit demo.rn')





#recvThread create

recvThread = threading.Thread(target=recv)

recvThread.start()



while True: 



    try:

        msg = raw_input();



        if not msg:

            break  



        if 'end' in msg:

            print ('...')

            sock.close()

            break

    if 'exit' in msg:

        break



        # Send data

        msg = msg.encode(encoding="utf-8") 

        sent = sock.sendto(msg, tello_address)

    except KeyboardInterrupt:

        print ('n . . .n')

        sock.close()  

        break

I'm working in Ubuntu 18.10 if that it's important and the drone connects with the smartphone.

If someone can help me convert the python code to java I will be grateful.