choiceevt.java

java练习程序

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

public class ChoiceEVT extends Applet implements ItemListener
{
	Choice choice1,choice2;
	TextField text1,text2;
	public void init()
	{
		setLayout (new GridLayout(2,2));
		choice1=new Choice();
		choice2=new Choice();
		text1=new TextField(10);
		text2=new TextField(10);
		choice1.add("音乐天地");
		choice1.add("武术天地");
		choice1.add("象棋乐园");
		choice1.add("交友聊天");
		choice2.add("辽宁日报");
		choice2.add("北京日报");
		choice2.add("上海日报");
		choice2.add("足球晚报");
		add(choice1);
		add(choice2);
		add(text1);
		add(text2);
		choice1.addItemListener(this);
		choice2.addItemListener(this);
        }
        public void itemStateChanged(ItemEvent e)
        {
        	if(e.getItemSelectable()==choice1)
        	{
        		if(choice1.getSelectedIndex()==0)
        		{
        			text1.setText("小提琴曲:梁祝");
        		}
        		else if(choice1.getSelectedIndex()==1)
        		{
        			text1.setText("少林寺:少林拳");
        		}
        		else if(choice1.getSelectedIndex()==2)
        		{
        			text1.setText("和为贵");
        		}
        		else if(choice1.getSelectedIndex()==3)
        		{
        			text1.setText("知心朋友");
        		}
        	}
        	else if(e.getItemSelectable()==choice2)
        	{
        		if(choice2.getSelectedIndex()==0)
        		{
        			text2.setText("信息很好");
        		}
        		else if(choice2.getSelectedIndex()==1)
        		{
        			text2.setText("每天六版");
        		}
        		else if(choice2.getSelectedIndex()==2)
        		{
        			text2.setText("很难看到");
        		}
        		else if(choice2.getSelectedIndex()==3)
        		{
        			text2.setText("球迷天地");
        		}
        	}
        }
}