Semitransparent Panel & jComponent not visible

Question

Problem:jButton is not visible & CockPitPanel should be semitransparent import java.awt.Color;
import java.awt.GraphicsEnvironment;
import java.awt.*;
import javax.swing.*;
import javax.swing.JFrame;
public class RBStrategy implements Runnable
     private JFrame frame;
     static boolean onlyScreen = true;
     static Screen screen;
     static AircraftCockPit aircraftCockPit;
     public RBStrategy(JFrame frame, Screen screen)
          this.frame = frame;
          this.screen = screen;
     public static void main(String[] args)
          JFrame frame = new JFrame();
          screen = new Screen();
          frame.setUndecorated(true);
          frame.getContentPane().add(screen);
          GraphicsEnvironment.getLocalGraphicsEnvironment().
               getDefaultScreenDevice().setFullScreenWindow(frame);
          screen.setLayout(null);
          aircraftCockPit = new AircraftCockPit(screen);
          new RBStrategy(frame, screen).run();
     public void run()
          do
               String output;
               try
                    Thread.sleep(1000);
               catch (InterruptedException ie)
                    ie.printStackTrace(System.err);
          while (true);
class Screen
     extends JPanel
     implements
          Runnable {
               boolean progressing = true;
               Thread t;
               Screen()     {
                    this.add(new JButton("ButtonScreen"));
                    this.setBackground(Color.BLACK);
                    this.start();
             public void stop()     {
                  progressing = false;
                  t.stop();
             public void start()     {
                  progressing = true;
                  t = new Thread(this);
                  t.start();
             protected void paintComponent(Graphics g)     {
                       super.paintComponent(g);
                       g.setColor(Color.red);
                       for(int i=0;i<this.getHeight();i=i+10)     {
                                 g.drawLine(0,i,this.getWidth(),i);
               public void run()     {
                    try     {
                         while(progressing)     {
                              this.repaint();
                              Thread.sleep(1);
                    }catch     (InterruptedException e)     {
                         System.out.println("Interrupted");
class AircraftCockPit
     extends JPanel
     implements  Runnable {
          boolean progressing=true;     
          Thread t;
          JButton jButton;
          Screen screen;
          AircraftCockPit(Screen s)     {
               screen = s;
               jButton=new JButton("ButtonCockPit");
               jButton.setBounds(30,30,40,40);
               this.setBackground(Color.GRAY);
               this.setBounds(s.getWidth()*3/4,s.getHeight()>>2,s.getWidth()>>2,s.getHeight()*9/20);
               s.add(this);
               this.start();
          public void stop()     {
               progressing = false;
               t.stop();
          public void start()     {
               progressing = true;
               t = new Thread(this);
               t.start();
          protected void paintComponent(Graphics g)     {
                    super.paintComponent(g);
          public void run()     {
               try     {
                    while(progressing)     {
                         this.repaint();
                         Thread.sleep(2);
               }catch     (InterruptedException e)     {
                    System.out.println("Interrupted");
}

Answer 1

As I suggested in your last posting, the size of the Screen panel is (0, 0). Since the size of the AircraftCockpit is based on the size of the Screen it is also (0, 0). So there is nothing to paint.
Did you add a few System.out.println(...) statements to verify this?