cbgroup.java

来自「这是我们上java课时自己编的几个测试小程序」· Java 代码 · 共 40 行

/**
 * @(#)CBGroup.java
 *
 *
 * @author 
 * @version 1.00 2007/11/4
 */

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class CBGroup extends Applet implements ItemListener
{	String msg="";
	Checkbox win98,winNT,solaris,mac;
	CheckboxGroup cbg;
	public void init()
	{	cbg=new CheckboxGroup();
		win98=new Checkbox("Windows 98",cbg,true);
		winNT=new Checkbox("Windows NT/2000",cbg,false);
		solaris=new Checkbox("Solaris",cbg,false);
		mac=new Checkbox("MacOS",cbg,false);
		add(win98);	add(winNT);	add(solaris);	add(mac);
		win98.addItemListener(this);
		winNT.addItemListener(this);
		solaris.addItemListener(this);
		mac.addItemListener(this);
	}	
public void itemStateChanged(ItemEvent ie)
{
repaint();	
}
public void paint(Graphics g)
{
msg="Current state: ";
msg+=cbg.getSelectedCheckbox().getLabel()+" ";
msg+=cbg.getSelectedCheckbox().getState();
g.drawString(msg,6,100);	
}
}