1    package bookExamples.ch26Graphics.draw2d; 
2     
3    import java.awt.*; 
4     
5    abstract class Shape extends Component 
6            implements Paintable { 
7        public void erase(Frame f, Graphics g) { 
8            g.setXORMode(f.getBackground()); 
9            paint(g); 
10           g.setColor(f.getForeground()); 
11           g.setPaintMode(); 
12       } 
13   }