java swing 复选框JCheckButton

效果图

代码：

import java.io.File ;
import java.awt.GridLayout ;
import java.awt.Container ;
import java.awt.event.WindowAdapter ;
import java.awt.event.WindowEvent ;
import java.awt.event.WindowListener ;
import java.awt.event.ItemListener ;
import java.awt.event.ItemEvent ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import javax.swing.JCheckBox ;
import javax.swing.BorderFactory ;
import javax.swing.ButtonGroup ;
import javax.swing.ImageIcon ;

class MyCheck
{
   private JFrame frame = new JFrame() ;
   Container con = frame.getContentPane() ;
   JPanel pan = new JPanel() ;
   JCheckBox jcb1 = new JCheckBox("在校生") ;
   JCheckBox jcb2 = new JCheckBox("男生") ;
   JCheckBox jcb3 = new JCheckBox("本科") ;
   public MyCheck()
   {
      pan.setBorder(BorderFactory.createTitledBorder("请选择")) ;
      pan.add(jcb1) ;
      pan.add(jcb2) ;
      pan.add(jcb3) ;
      con.add(pan) ;
      this.frame.setSize(300,200) ;
      this.frame.setVisible(true) ;
      this.frame.addWindowListener(new WindowAdapter()
      {
         public void windowClosing(WindowEvent e)
         {
            System.exit(1) ;
         }
      }) ;
   }
}

class Tester
{
   public static void main(String args[])
   {
      new MyCheck() ;
   }
}