uselist.java

来自「Java语言」· Java 代码 · 共 30 行

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class UseList extends Applet implements ItemListener
{
   List picList;
   Image pic[]=new Image[5];
   int k; 
  public void init()
  {
      for(int i=0;i<pic.length;i++){
	pic[i]=getImage(getCodeBase(),"B"+(i+1)+".GIF");}
      picList=new List(2, false);
      for(int i=0;i<pic.length;i++)
	picList.add("picture"+(i+1));
      add(picList);
      picList.select(0);
      picList.addItemListener(this);
      setSize(300,200);
  }
   public void paint(Graphics g){
	g.drawImage(pic[k],100,50,pic[k].getWidth(this)*2,pic[k].getHeight(this)*2,this);
   }
   public void itemStateChanged(ItemEvent e){
	if(e.getItemSelectable()==picList)
	   k=picList.getSelectedIndex();
        repaint();
   }
}