testlist.java

这是一张java应用教程的随书光盘

import java.applet.*;import java.awt.*;
import java.awt.event.*;
public class Testlist extends Applet implements ItemListener,
ActionListener
{ List list1;   TextArea text1,text2;
  public void init()
  { 
  list1=new List(3,false); 
  Panel p1=new Panel();p1.add(list1);
  
  text1=new TextArea(2,20);text2=new TextArea(3,40);
  list1.add("计算机专业");list1.add("自动化专业");
  list1.add("电子信息专业");
 
  add(p1);add(text1); add(text2);
  list1.addItemListener(this);list1.addActionListener(this);
  } 
  public void itemStateChanged(ItemEvent e)
  {  if(e.getItemSelectable()==list1)
     
    {if(list1.getSelectedIndex()==0)
     { text1.setText("你选择的专业是：计算机") ;}
     else if(list1.getSelectedIndex()==1)
     { text1.setText("你选择的专业是：自动化") ;} 
     else if(list1.getSelectedIndex()==2)
      { text1.setText("你选择的专业是：电子信息") ;}
    }
  }
 public void actionPerformed(ActionEvent e)
 { if(e.getSource()==list1)
  
   { if(list1.getSelectedIndex()==0)
      { 
        text2.setText("your selected major is :computer");
       }
     else if(list1.getSelectedIndex()==1)
      { 
        text2.setText("your selected major is :automation");
       }
      else if(list1.getSelectedIndex()==2)
      { 
        text2.setText("your selected major is :electronic information");
       }
   } 
 }
}