chec.java

用java编写的一些初级代码

import java.awt.*;
import java.awt.event.*;
class CbItem implements ItemListener
{
    public void itemStateChanged (ItemEvent e)
    {
    }
}
public class Chec
{
    Checkbox cb1=new Checkbox("aaa",true);
    CheckboxGroup cbg=new CheckboxGroup();
    Checkbox cb2=new Checkbox("yes",cbg,true);
    Checkbox cb3=new Checkbox("no",cbg,true);
    public static void main(String [] args)
    {
	new Chec().init();
    }
    public void init()
    {
	Frame f= new Frame ("TeChec");
	FlowLayout fl=new FlowLayout();
	f.setLayout(fl);
	f.add(cb1);
	f.add(cb2);
	f.add(cb3);
	cb1.addItemListener(new CbItem());
	cb2.addItemListener(new CbItem());
	cb3.addItemListener(new CbItem());
	f.setBounds(0,0,200,200);
	f.setVisible(true);
	f.addWindowListener(new WindowAdapter (){
    public void windowClosing (WindowEvent e)
    {
	e.getWindow().setVisible(false);
	((Window)e.getComponent()).dispose();
	System.exit(0);
    }
	}
	    
	    );
    }
}