# Java Notes

# Drawing

The `java.awt.Graphics` class (see GUI Graphicsis the basis for drawing simple graphics (lines, circles, text, ...). It is easy to use, and can be used with the `Color` class to set the drawing color and `Font` class to set the font for drawing text.

## Additional graphical classes

In Java 2, there have been many improvements in the graphics capabilities, including the `Graphics2D` class, classes to represent shapes, easier and more powerful image processing, .... Advanced imaging and 3-D are also being added to Java.

## Drawing on a JPanel

To draw, subclass JPanel, and write a `paintComponent()` method for it. Call `repaint()` from outside the `paintComponent` method whenever something has changed and the panel has to be redrawn. Never call `repaint` from within the `paintComponent` method or your programs will crash with infinite recursion or produce some pathological flickering.