java实现图片浏览：java核心技术学习

2008-03-20 10:11

；可以很好的体现出java类库的具体操作 import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; //view picture public class ImageViewer { public static void main(String[] args) {    JFrame frame = new ImageViewerFrame();    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    frame.setVisible(true); } } //display image class class ImageViewerFrame extends JFrame { public ImageViewerFrame() {    //add a label to show image    setTitle("ImageViewer");    setSize(DEFAULT_WEDTH,DEFAULT_HEIGHT);    label = new JLabel();    add(label);    chooser = new JFileChooser();    chooser.setCurrentDirectory(new File("."));    //set menu    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 event)     {      int result = chooser.showOpenDialog(null);      if (result == 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_WEDTH=300; private static final int DEFAULT_HEIGHT=300; }