JAVA文件夹浏览器

import java.awt.event.*; import java.io.*; import javax.swing.*; /** * A program for viewing images. * It's just a test. * @author leftok */ public class ImageViewer { public static void main(String[] args) { JFrame frame = new ImageViewerFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } } /** * A frame with a label to show an image. */ class ImageViewerFrame extends JFrame { private JLabel label; private JFileChooser chooser; private static final int DEFAULT_WIDTH = 400; private static final int DEFAULT_HEIGHT = 300; public ImageViewerFrame() { setTitle("ImageViewer"); setSize(430, DEFAULT_HEIGHT); // use a label to display the images label = new JLabel(); add(label); // set up the file chooser chooser = new JFileChooser(); chooser.setCurrentDirectory(new File(".")); // set up the menu bar JMenuBar menuBar = new JMenuBar(); setJMenuBar(menuBar); JMenu menu = new JMenu("文件选择"); menuBar.add(menu); JMenuItem openItem = new JMenuItem("打开"); menu.add(openItem); openItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { // show file chooser dialog int result = chooser.showOpenDialog(null); // if file selected, set it as icon of the label 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); } } ); } }