初始化：
勾选之后
源代码：
<span style="font-size:14px;">import java.io.File ;import java.awt.event.WindowEvent ;import java.awt.event.WindowListener ;import java.awt.event.WindowAdapter ;import java.awt.event.ItemEvent ;import java.awt.Container ;import java.awt.event.ItemListener ;import java.awt.GridLayout ;import javax.swing.JFrame ;import javax.swing.JCheckBox ;import javax.swing.JPanel ;import javax.swing.ImageIcon ;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){JCheckBox jcb = (JCheckBox)e.getItem() ;{if(jcb.isSelected()){jcb.setIcon(new ImageIcon(right)) ;}else jcb.setIcon(new ImageIcon(wrong)) ;}} } ;class MyCheckBox{private JFrame frame = new JFrame() ;private String wrong = "d:"+File.separator+"wrong.gif" ;private Container con = frame.getContentPane() ;private JPanel pan = new JPanel() ;JCheckBox jcb1 = new JCheckBox("学生",new ImageIcon(wrong)) ;JCheckBox jcb2 = new JCheckBox("成年人",new ImageIcon(wrong)) ;JCheckBox jcb3 = new JCheckBox("男孩",new ImageIcon(wrong)) ;public MyCheckBox(){pan.setBorder(BorderFactory.createTitledBorder("选择人物属性")) ;pan.setLayout(new GridLayout(1,3)) ;pan.add(jcb1) ;pan.add(jcb2) ;pan.add(jcb3) ;jcb1.addItemListener(new MyItemListener()) ;jcb2.addItemListener(new MyItemListener()) ;jcb3.addItemListener(new MyItemListener()) ;con.add(pan) ;this.frame.setSize(300,300) ;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 MyCheckBox() ; }}</span>
