Icon,ImageIcon标签

 1 public class IconDemo extends JFrame implements  Icon {
 2 int width;
 3 int height;
 4 public  IconDemo(){
 5 }
 6     public  IconDemo(int width,int height){
 7         this.width=width;
 8         this.height=height;
 9     }
10     public  void init(){
11         Icon icon=new IconDemo(20,30);
12         JLabel label=new JLabel("hahaha",icon,SwingConstants.CENTER);
13         Container container= this.getContentPane();
14         container.add(label);
15        setVisible(true);
16     }
17     public static void main(String[] args) {
18 new IconDemo().init();
19     }
20 
21     @Override
22     public void paintIcon(Component c, Graphics g, int x, int y) {
23             g.fillOval(x,y,width,height);
24     }
25 
26     @Override
27     public int getIconWidth() {
28         return width;
29     }
30 
31     @Override
32     public int getIconHeight() {
33         return  height;
34     }
35 }

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