java_ImageViewer.rar_image_imageviewer.ja_java viewer_图像浏览_图像浏览器

import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; /** A program for viewing images. */ public class ImageViewer { public static void main(String[] args) { JFrame frame = new ImageViewerFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.show(); } } /** A frame with a label to show an image. */ class ImageViewerFrame extends JFrame { public ImageViewerFrame() { setTitle("ImageViewer"); setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); // use a label to display the images label = new JLabel(); Container contentPane = getContentPane(); contentPane.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("File"); menuBar.add(menu); JMenuItem openItem = new JMenuItem("Open"); menu.add(openItem); openItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { // show file chooser dialog int r = chooser.showOpenDialog(null); // if file selected, set it as icon of the label if(r == JFileChooser.APPROVE_OPTION) { String name = chooser.getSelectedFile().getPath(); label.setIcon(new ImageIcon(name)); } } }); JMenuItem exitItem = new JMenuItem("Exit"); 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; }