[java]Applicazione testo scorrevole

[keratox]

Così ho scritto un programma con il compito di far scorrere del testo.
Solo che non appare niente

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class scorriwords extends JFrame implements Runnable{
	int x=1,y=1;
	Thread runner;
	
	scorriwords(){
		super("ScorriWords v.1.0 - Keratox");
		setBounds(20,10,700,500);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JPanel pan = new JPanel();
		setContentPane(pan);
		
		if(runner==null){
			runner= new Thread();
			runner.start();
		}
	}
	
	public void run(){
		while(true){
			y--;
		}
	}
	
	public void paintComponent(Graphics g){
		Graphics2D g2 = (Graphics2D)g;
		g2.drawString("Word", x,y);
	}
	
	public static void main(String[] args){
	      scorriwords sw = new scorriwords();
	      sw.show();
	      repaint();	
	}
	
	
}

Grazie

ciao