HELP! * GREY=local LOCAL HTML version of Foils prepared 29 January 1996

Foil 72 Some Basic Methods for Applets -- II

From CPS616 Lectures on Java CPS616 Basic Information Track for Computational Science -- Winter-Spring Semester 96. by Geoffrey C. Fox * See also color IMAGE

public void paint(Graphics g) actually has an argument and draws what you want on the screen
There is somewhat confusing other methods update() and repaint() which need to used in advanced applications. You may need to call repaint() in a dynamic applet to change display but update() would not need to be called as invoked by repaint(). However update() is sometimes best overridden
public void repaint() is a request by you to the Java runtime to update screen
public void update(Graphics g) is invoked by repaint() and performs the screen update which involves clearing screen and invoking paint()



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