shiyan7_3.java

java例子

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Shiyan7_3 extends Applet implements ItemListener
{
	Checkbox cb1,cb2;
	int i,j;
	public void init()
	{
		cb1=new Checkbox("学习");
		cb1.addItemListener(this);
		add(cb1);
		cb2=new Checkbox("玩耍");
		cb2.addItemListener(this);
		add(cb2);
	}
	public void itemStateChanged(ItemEvent e)
	{
		i=j=0;
		if(cb1.getState())i=1;//设置复选框状态
		if(cb2.getState())j=2;
		repaint();
		}
    public void paint(Graphics g)
	{
		
		int m=j+3*i;
		if(m==3)g.drawString("学习",10,100);
		else
			if(m==2)g.drawString("玩耍",25,100);
		else
			if(m==5)g.drawString("劳逸结合",40,100);
	}
}