paint method and graphics

i am create animation in japplet and i want to know if iam using paint method and draphics2d the right way.

	public void paint(Graphics g)
	{	
	     super.paint(g);
		Graphics2D g2d = (Graphics2D) g; 
		
		
		g2d.fillRect(x, y, width, height);   //player	
		
	}/** end of paint method ***/

another question i had was in run method. i set up thread to do animations. let me know if there is a beater way to do this.

	/*** run method ***/
	public void run()
	{
		
		while(true) //main game loop
		{
			//move image here
			x += dx;
			
			if(x+width >= getWidth())
                        {
				x -= dx;
			}
			
			repaint();
			
			try{
				Thread.sleep(17);
			}
			catch(InterruptedException e){
				e.printStackTrace();
			}
		}//end of while loop
	}/*** end of run method ***/

reason iam asking for a better way bc this code does move the Rect() but it is flicking.