static Frame w; 
Graphics grap; 

void setup(){ 
  size(320,240); 
  setupNew(); 

  frameRate(5); 
  this.frame.setTitle("I'm the old window!"); 
} 

void setupNew(){ 
  w=new Frame("Hiya! I'm new!"); 

  //see http://java.sun.com/docs/books/tutorial/post1.0/ui/mouselistener.html
  //you could probably pass this all to the regular processing stuff with super.processMouseEvent( e ); 
  MouseListener Win2MouseListner = new MouseListener() {
    public void mouseEntered(MouseEvent e) {
    }
    public void mouseClicked(MouseEvent e){ 
	println("Click! "); 
    }
    public void mouseReleased(MouseEvent e){
    }
    public void mouseExited(MouseEvent e){
    }
    public void mousePressed(MouseEvent e){
    }


  };

  //see http://java.sun.com/docs/books/tutorial/post1.0/ui/mousemotionlistener.html
  MouseMotionListener Win2MouseMovementListner = new MouseMotionListener(){
    public void mouseDragged(MouseEvent e) {
    }
    public void mouseMoved(MouseEvent e) {
	println(e.getX()+","+e.getY());
    }
  };

  w.addMouseListener(Win2MouseListner);
  w.addMouseMotionListener(Win2MouseMovementListner);
  Dimension dim = Toolkit.getDefaultToolkit().getScreenSize(); 

  w.setBounds(dim.width/2-160,dim.height/2-120,320,240); 
  w.show(); 
  grap= w.getGraphics(); 

} 

void draw() 
{ 
  background(0,random(255),0); 

  try { 
    PGraphics stuff;  
    stuff = createGraphics(320, 240, JAVA2D); 

    //draw your stuff here 
    stuff.beginDraw(); 
    stuff.background(random(255),0,0); 
    stuff.stroke(255); 
    stuff.line(40, 40, 50,50); 
    stuff.endDraw(); 

    BufferedImage img = PG2BI(stuff); 
    grap.drawImage(img, 0, 0, this); 
  } 
  catch(Exception e) { 
    e.printStackTrace(); 
  } 

} 

BufferedImage PG2BI(PGraphics i) {  
  BufferedImage img=new BufferedImage(i.width, i.height, BufferedImage.TYPE_INT_RGB);  
  i.loadPixels();  
  img.setRGB(0, 0, i.width, i.height, i.pixels, 0, i.width);  
  return img; 
}