Problem: How do I paint thick lines? patterns?

The JavaTM 2D API provides extensive support for implementing line widths and styles, as well as patterns for use in filling and stroking shapes. See the 2D Graphics trail for more information on using the Java 2D API.
(quelle)

Das heisst du aenderst

public void paint(Graphics gfx){...}

in public void paint(Graphics2D gfx){...}

und zeichnest dann mit den 2D bibliotheken:

http://java.sun.com/docs/books/tut…okeandfill.html