Graphics abstract class

[curious_programmer]

hi,

I know that the Graphics class is an abstract class.
For that reason, normally, we can not create an instace of this class.
Why can i code this

public void paint(Graphics g) {

.....
}

Where the g variable has to receive the adress of an instance of the Graphics class.

Thanks a lot for explaining it to me.

Regards.

curious_programmer

[DarrylBurke]

You don't call painting methods directly. You call repaint() and the GUI toolkit supplies an appropriate concrete subclass of Graphics (actually, for more than 10 years, a subclass of Graphics2D).

Read more about it in the Tutorial Lesson: Performing Custom Painting (The Java™ Tutorials > Creating a GUI With JFC/Swing)

In future, AWT/Swing questions should be posted in the AWT/Swing section. If your question is more about Java 2D, there's a section for that too.

db

[DarrylBurke]

... the g variable has to receive the adress of an instance of the Graphics class.

No, the parameter has to be a reference to a Graphics instance. Not an address.

db