useradiobox.java

来自「Java语言」· Java 代码 · 共 34 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class UseRadiobox extends Applet implements ItemListener{
   CheckboxGroup cg=new CheckboxGroup();
   Checkbox ck[]=new Checkbox[5];
   Image[] img=new Image[5];
   int k=0;
   public void init(){
      for(int i=0;i<img.length;i++)
         img[i]=getImage(getCodeBase(),"B"+(i+1)+".gif");
      for(int i=0;i<ck.length;i++){
	 ck[i]=new Checkbox("ͼƬ"+(i+1),cg,false);
         ck[i].addItemListener(this);
         add(ck[i]);
      }
      ck[0].setState(true);
      setSize(300,200);
   }
   public void paint(Graphics g){
	g.drawImage(img[k],60,30,180,120,this);
   }
   public void itemStateChanged(ItemEvent e){
	for(int i=0;i<img.length;i++){
	   //if(e,getSource()==ck[i]);
           //if(cg.getSelectedCheckbox()==ck[i])
           if(e.getItemSelectable()==ck[i])
              k=i;
	}
        repaint();
   }
}