usechoice.java

Java语言

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class UseChoice extends Applet implements ItemListener{
   Label label=new Label("                                   ");
   Choice choice=new Choice();
   public void init(){
      choice.add("car");
      choice.addItem("hand");
      choice.addItem("head");     
      choice.addItem("warm");
      add(choice);
      choice.addItemListener(this);
      choice.select(2);
      add(label);      	
//     setSize(400,200);
   }
   public void itemStateChanged(ItemEvent e){
	if(choice.getSelectedIndex()==0)
	   label.setText("n.汽车；小汽车；车辆");
	if(choice.getSelectedItem()=="head")
	   label.setText("n.头脑；领袖；最前面的部分，顶点");
	if(choice.getSelectedItem()=="hand")
	   label.setText("n.手；支配；指针，手艺");
	if(choice.getSelectedItem()=="warm")
	   label.setText("adj.暖和的；激烈的；多情的，兴奋的");        
   }
}