Boks. Overskrive. Tekst

Kode 

import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import java.net.URL;

public class ScrollText extends JApplet implements Runnable
{
	private String currentText = "Hej med dig";
	private BufferedImage buffer;
	private Image background;
	private Graphics gfx;
	private int y;
	private int speed = 5;
	
	public void init ()
	{
		setSize (400, 400);
		buffer = new BufferedImage (400, 400, BufferedImage.TYPE_INT_ARGB);
		gfx = buffer.getGraphics();
		y = 400;
		
		try 
		{
			URL url = new URL(getCodeBase (), "baggrund.jpg");
			background = new ImageIcon (url).getImage();
	    }
	    catch (Exception ex) {  }
		
		Thread thread = new Thread (this);
		thread.start();
	}
	
	public void paint (Graphics g)
	{
		FontMetrics fontMetrics = g.getFontMetrics();
		
		int width = fontMetrics.stringWidth(currentText);
		int startOfText = (400 / 2) - (width / 2);
		
		gfx.drawImage(background, 0, 0, this);
		gfx.setColor(Color.black);
		gfx.fillRect(startOfText, y - 10, width, 15);
		gfx.setColor(Color.white);
		gfx.drawString(currentText, startOfText,y);
		
		g.drawImage(buffer, 0, 0, this);
	}
	
	public void update (Graphics g)
	{
		paint (g);
	}
	
	public void run ()
	{
		while (true)
		{
			try 
			{
				if (y < 0)
					y = 400;
					
				y--;
				repaint ();
				Thread.sleep(speed);
		    }
		    catch (Exception ex) { ex.printStackTrace(); }
		}
	}
}

Hvad er det præcist du vil opnå?
Er det noget dynamisk tekst der ændrer sig hele tiden?