This method is called every time the robot is painted. You should override this method if you want to draw items for your robot on the battle field, e.g. targets, virtual bullets etc.
This method is very useful for debugging your robot.
Note that the robot will only be painted if the "Paint" is enabled on the robot's console window; otherwise the robot will never get painted (the reason being that all robots might have graphical items that must be painted, and then you might not be able to tell what graphical items that have been painted for your robot).
Also note that the coordinate system for the graphical context where you paint items fits for the Robocode coordinate system where (0, 0) is at the bottom left corner of the battlefield, where X is towards right and Y is upwards.
@param g the graphics context to use for painting graphical items for therobot.
@see java.awt.Graphics2D
@since 1.1