Java Panel Double Buffering

preguntándome si alguien podría señalarme la dirección correcta, he desarrollado un juego de pong y necesita doble búfer debido al parpadeo. Iv probé algunas de las publicaciones de aquí para intentar que funcionen, pero todavía soy un principiante con el swing, pero cualquier ayuda sería increíble, gracias.

public class PongPanel extends JPanel implements Runnable {

private int screenWidth = 500;
private int screenHeight = 300;

private boolean isPaused = false;
private boolean isGameOver = false;

private int playToPoints = 10;

private Padel player1,player2;
private Ball ball;

private Thread gameThread;
private Image dbImage;
private Graphics dbg; 

public PongPanel() {
   setPreferredSize(new Dimension(screenWidth,screenHeight));
   setBackground(Color.BLACK);
   setDoubleBuffered(true);
   setFocusable(true);
   requestFocus();

   player1 = new Padel(Position.LEFT,screenWidth,screenHeight);
   player2 = new Padel(Position.RIGHT,screenWidth,screenHeight);
   ball = new Ball(10,screenWidth/2,screenHeight/2,Color.WHITE);
}

public void addNotify(){
 super.addNotify();
   startGame();
}

private void startGame(){
  gameThread = new Thread(this);
  gameThread.start();
}

@Override
public void run() {
 while (!isGameOver) {   
 dbImage = createImage(screenWidth,screenHeight);
 dbg = this.getGraphics();
 if(!isPaused){
   if(!gameOverCheck()){
     updateGame();
     paintComponents(dbg);   
    }
 }else if(isPaused){
    dbg.setColor(Color.ORANGE);
    dbg.setFont(new Font("serif",Font.BOLD,50));
    dbg.drawString("Paused", screenWidth/2-82, screenHeight/2);
 } 
 try {
     Thread.sleep(30);
    } catch (InterruptedException e) {e.printStackTrace();}
   }
   }

  private boolean gameOverCheck(){
  if(player1.getScore() == playToPoints){
   dbg.setColor(player1.getColour());
   dbg.setFont(new Font("serif",Font.BOLD,50));
   dbg.drawString("Player 1 Wins!", screenWidth/2 - 161, screenHeight/2);
   setGameOver(true);
   return true;
  }else if(player2.getScore() == playToPoints){
   dbg.setColor(player2.getColour());   
   dbg.setFont(new Font("serif",Font.BOLD,50));
   dbg.drawString("Player 2 Wins!", screenWidth/2 - 161, screenHeight/2);
   setGameOver(true);
   return true;
  }

  return false;
 }

 private void updateGame(){
  ball.move(screenWidth,screenHeight,player1,player2);
  player1.aiForPadel(screenWidth, screenHeight, ball.getX(), ball.getY());
  player2.aiForPadel(screenWidth, screenHeight, ball.getX(), ball.getY());

 }

  @Override
  public void paintComponents(Graphics g) {
  super.paintComponents(g);
  dbg.setColor(Color.BLACK);
  dbg.fillRect(0, 0, screenWidth+20, screenHeight+20);
  dbg.setColor(Color.WHITE);
  dbg.drawLine(screenWidth/2, 0, screenWidth/2, screenHeight);
  dbg.setFont(new Font("serif",Font.BOLD,32));
  dbg.drawString(player1.getScore()+"", screenWidth/2-40, screenHeight - 20);
  dbg.drawString(player2.getScore()+"", screenWidth/2+20, screenHeight - 20);
  ball.drawBall(dbg);
    player1.drawPadel(dbg);
    player2.drawPadel(dbg);
 }
}

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