Making an efficient paint program

Question

I'm writing a small paint program atm that has a 'freehand' tool which means a point is drawn at whatever locations the mouse button is held down at.
Currently the code is like this:
public void mouseDragged(MouseEvent me)
            a = new Point();
            a.setLocation(me.getX(),me.getY());
            pt.add(a);
            repaint();
        }Is there a more effcicient way of doing this, if I drag my mouse accross the sccreen there are noticeable gaps between the points.

Answer 1

Don't draw a point at each spot along the drag path, draw a line between every two adjacent points. The mouse won't be at every pixel along the path, you can easily move it fast enough that it skips points, so drawing lines between adjacent points compensates for that.