赵健在这里！

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;

/**
一个浏览图像的程序
*/
public class ImageViewer {
public static void main(String[] args) {
JFrame Frame = new ImageViewerFrame();
Frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Frame.setVisible(true);
}
}

/**
用一个窗体上的标签显示图像
*/
class ImageViewerFrame extends JFrame {
public ImageViewerFrame() {
setTitle("图像浏览器");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

//新建标签，用来显示图像
Label = new JLabel();
add(Label);

//新建选择文件
chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));

//新建菜单栏
JMenuBar MenuBar = new JMenuBar();
setJMenuBar(MenuBar);

JMenu menu = new JMenu("文件");
MenuBar.add(menu);

JMenuItem openItem = new JMenuItem("打开");
menu.add(openItem);
openItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent Event) {
//显示文件选择对话框
int result = chooser.showOpenDialog(null);
//如果选定的文件，设置为图标标签
if (result == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getPath();
Label.setIcon(new ImageIcon(name));
}
}
});

JMenuItem exitItem = new JMenuItem("退出");
menu.add(exitItem);
exitItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent Event) {
System.exit(0);
}
});

}

private JLabel Label;
private JFileChooser chooser;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 400;
}