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import java.awt.Container ;
import java.awt.GridLayout ;
import java.awt.event.WindowAdapter ;
import java.awt.event.WindowEvent ;
import javax.swing.JFrame ;
import javax.swing.JPanel ;
import javax.swing.JCheckBox ;
import javax.swing.BorderFactory ;
class MyCheckBox{
    private JFrame frame = new JFrame("Welcome To MLDN") ;    // 定义窗体
    private Container cont = frame.getContentPane() ;    // 得到窗体容器
    private JCheckBox jcb1 = new JCheckBox("MLDN") ;    // 定义一个复选框
    private JCheckBox jcb2 = new JCheckBox("MLDNJAVA") ;    // 定义一个复选框
    private JCheckBox jcb3 = new JCheckBox("智囊团") ;    // 定义一个复选框
    private JPanel pan = new JPanel() ;
    public MyCheckBox(){
        pan.setBorder(BorderFactory.createTitledBorder("请选择最喜爱的网站")) ;
        pan.setLayout(new GridLayout(1,3)) ;    // 设置组件的排版 
        pan.add(this.jcb1) ;    // 增加组件
        pan.add(this.jcb2) ;    // 增加组件
        pan.add(this.jcb3) ;    // 增加组件
        cont.add(pan) ;    // 将面板加入到容器之中
        this.frame.setSize(330,80) ;
        this.frame.setVisible(true) ;    // 设置可显示
        this.frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent arg){
                System.exit(1) ;
            }
        }) ;
    }

}

public class JCheckBoxDemo01{
    public static void main(String args[]){
        new MyCheckBox() ;
    }
}
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import java.io.File ;
import java.awt.Container ;
import java.awt.GridLayout ;
import java.awt.event.WindowAdapter ;
import java.awt.event.WindowEvent ;
import java.awt.event.ItemListener ;
import java.awt.event.ItemEvent ;
import javax.swing.JFrame ;
import javax.swing.ImageIcon ;
import javax.swing.JPanel ;
import javax.swing.JCheckBox ;
import javax.swing.BorderFactory ;
 
class MyItemListener implements ItemListener{
    private String right = "d:" + File.separator + "right.png" ;
    private String wrong = "d:" + File.separator + "wrong.gif" ;
    public void itemStateChanged(ItemEvent e){
        // 不管如何操作，则肯定由JCheckBox产生事件
        JCheckBox jcb = (JCheckBox)e.getItem() ;    // 得到产生的事件
        if(jcb.isSelected()){   // 如果被选中了，则显示正确的图片
            jcb.setIcon(new ImageIcon(right)) ;
        }else{
            jcb.setIcon(new ImageIcon(wrong)) ;
        }
    }
}
class MyCheckBox{
    private String wrong = "d:" + File.separator + "wrong.gif" ;
    private JFrame frame = new JFrame("Welcome To MLDN") ;  // 定义窗体
    private Container cont = frame.getContentPane() ;   // 得到窗体容器
    private JCheckBox jcb1 = new JCheckBox("MLDN",new ImageIcon(wrong)) ;   // 定义一个复选框
    private JCheckBox jcb2 = new JCheckBox("MLDNJAVA",new ImageIcon(wrong)) ;   // 定义一个复选框
    private JCheckBox jcb3 = new JCheckBox("智囊团",new ImageIcon(wrong)) ;    // 定义一个复选框
    private JPanel pan = new JPanel() ;
    public MyCheckBox(){
        pan.setBorder(BorderFactory.createTitledBorder("请选择最喜爱的网站")) ;
        pan.setLayout(new GridLayout(1,3)) ;    // 设置组件的排版
        pan.add(this.jcb1) ;    // 增加组件
        pan.add(this.jcb2) ;    // 增加组件
        pan.add(this.jcb3) ;    // 增加组件
 
        jcb1.addItemListener(new MyItemListener()) ;
        jcb2.addItemListener(new MyItemListener()) ;
        jcb3.addItemListener(new MyItemListener()) ;
 
        cont.add(pan) ; // 将面板加入到容器之中
        this.frame.setSize(330,80) ;
        this.frame.setVisible(true) ;   // 设置可显示
        this.frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent arg){
                System.exit(1) ;
            }
        }) ;
    }
 
}
 
public class JCheckBoxDemo02{
    public static void main(String args[]){
        new MyCheckBox() ;
    }
}