在单选button操作中。能够使用ItemListener接口进行事件的监听。

package com.beyole.util;import java.awt.Container;import java.awt.GridLayout;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.File;import javax.swing.BorderFactory;import javax.swing.ButtonGroup;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JRadioButton;class MyRadio1 implements ItemListener {	private String right = "f:" + File.separator + "2.png";// 定义图片路径	private String wrong = "f:" + File.separator + "3.png";// 定义图片路径	private JFrame frame = new JFrame("Beyole");// 定义窗口	private Container container = frame.getContentPane();// 得到窗口容器	private JRadioButton jb1 = new JRadioButton("男", new ImageIcon(right), true);	private JRadioButton jb2 = new JRadioButton("女", new ImageIcon(wrong),			false);	private JPanel panel = new JPanel();// 定义一个面板	public MyRadio1() {		panel.setBorder(BorderFactory.createTitledBorder("选择性别"));// 定义一个面板的边框显示条		panel.setLayout(new GridLayout(1, 3));// 定义排版，一行三列		ButtonGroup group = new ButtonGroup();// 定义一个button组		group.add(this.jb1);// 将单选button组增加到一个组		group.add(this.jb2);// 将单选button组增加到一个组		panel.add(this.jb1);// 将单选button增加到面板其中		panel.add(this.jb2);// 将单选button增加到面板其中		jb1.addItemListener(this);// 增加监听事件		jb2.addItemListener(this);// 增加监听事件		container.add(panel);// 增加面板到容器中		this.frame.setSize(200, 100);		this.frame.setVisible(true);		this.frame.addWindowListener(new WindowAdapter() {			public void windowClosing(WindowEvent arg0) {				System.exit(1);			}		});	}	public void itemStateChanged(ItemEvent e) {		if (e.getSource() == jb1) {			jb1.setIcon(new ImageIcon(right));			jb2.setIcon(new ImageIcon(wrong));		} else {			jb2.setIcon(new ImageIcon(right));			jb1.setIcon(new ImageIcon(wrong));		}	}}public class JRadioButtonDemo1 {	public static void main(String[] args) {		new MyRadio1();	}}

以上程序。使用ImageIcon设置了两个单选button的图片，每次选项改变后都会触发itemStateChanged事件，之后改动每一个选项的显示图片。

程序截图：