choices.java

java程序设计 清华出版社 孙燮华老师编写的程序源代码

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class choices extends Applet implements ItemListener{
  Choice choice1;
  TextField text1;

  public void init(){
    text1=new TextField(20);
    add(text1);
    choice1=new Choice();
    choice1.add(getParameter("select1"));
    choice1.add(getParameter("select2"));
    choice1.add(getParameter("select3"));
    choice1.add(getParameter("select4"));
    add(choice1);
    choice1.addItemListener(this);
  }

  public void itemStateChanged(ItemEvent e){
    if(e.getItemSelectable()==choice1){
      text1.setText(((Choice)e.getItemSelectable()).getSelectedItem());
    }
  }
}