Movimentação controlada por Slider e Thread!

import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.UIManager;

@SuppressWarnings("serial")
public class Principal extends JPanel{

    public static final int WIDTH = 500;
    public static final int HEIGHT = 500;

    private static JFrame janela = new JFrame("Movimentação controlada!");
    private static JFrame controlWindow = new JFrame();

    private Ball ball = new Ball(50, 50);
    private JSlider sliderX = new JSlider();
    private JSlider sliderY = new JSlider();

    JLabel textX = new JLabel("X: ");
    JLabel textY = new JLabel("Y: ");

    // ---------------------------------------------------------------------- //

    private void sliderSensor()
    {
        ball.setSpeedX(sliderX.getValue());
        ball.setSpeedY(sliderY.getValue());
    }

    class Ball
    {
        private int x;
        private int y;

        private int sentido_1 = 2; // Baixo = 1 // Cima = 2
        private int sentido_2 = 1; // Esquerda = 1 // Direita = 2

        private int speedX = 5;
        private int speedY = 5;

        Thread movimento = new Thread(new Runnable() {

            @Override
            public void run() {

                while(true)
                {
                    try
                    {
                        Thread.sleep(50); // Intervalo de 50ms.
                        controlWindow.setTitle("X: "+x+" Y: "+y+" | X-SPEED: "+speedX+" Y-SPEED: "+speedY);
                    }
                    catch(InterruptedException e)
                    {
                        e.printStackTrace();
                    }

                    // --------------------------------------------------------------- //

                    if(sentido_1 == 1)
                    {
                        y += speedY;
                    }

                    else if(sentido_1 == 2)
                    {
                        y -= speedY;
                    }

                    if(sentido_2 == 1)
                    {
                        x -= speedX;
                    }

                    else if(sentido_2 == 2)
                    {
                        x += speedX;
                    }

                    // --------------------------------------------------------------- //

                    if(x < 0) sentido_2 = 2;
                    else if(x >= WIDTH - 30) sentido_2 = 1;

                    if(y < 0) sentido_1 = 1;
                    else if(y >= HEIGHT - 50) sentido_1 = 2;

                }

            }
        });

        public Ball(int x, int y) {
            this.x = x;
            this.y = y;

            movimento.start(); // Startando o thread
        }

        public void setX(int x) {
            this.x = x;
        }

        public void setY(int y) {
            this.y = y;
        }

        public int getX() {
            return x;
        }

        public int getY() {
            return y;
        }

        public void setSpeedX(int speedX) {
            this.speedX = speedX;
        }

        public void setSpeedY(int speedY) {
            this.speedY = speedY;
        }
    }

    public Principal() // Construtor padrão
    {
        this.setLayout(null);

        JPanel painelDeControle = new JPanel();

        painelDeControle.setLayout(null);
        painelDeControle.add(sliderX);
        painelDeControle.add(sliderY);

        painelDeControle.add(textX);
        painelDeControle.add(textY);

        sliderX.setBounds(100, 0, 100, 20);
        sliderX.setValue(1);
        sliderX.setMaximum(30);

        sliderY.setBounds(100, 50, 100, 20);
        sliderY.setValue(1);
        sliderY.setMaximum(30);

        textX.setBounds(50, 0, 100, 20);
        textY.setBounds(50, 50, 100, 20);

        controlWindow.add(painelDeControle);
        controlWindow.setVisible(true);
        controlWindow.setSize(350, 200);
        controlWindow.setAlwaysOnTop(true);
        controlWindow.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        controlWindow.setResizable(false);


    }

    public static void main(String[] args)
    {
        try
        {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }

        janela.add(new Principal());
        janela.setVisible(true);
        janela.setResizable(false);
        janela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        janela.setSize(WIDTH, HEIGHT);
        janela.setLocationRelativeTo(null);

    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);

        g.drawOval(ball.getX(), ball.getY(), 20, 20); // x, y, largura, altura.
        sliderSensor();

        repaint();
    }

}