import java.io.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.filechooser.*;/* * FileChooserDemo2.java is a 1.4 application that requires these files: *   ImageFileView.java *   ImageFilter.java *   ImagePreview.java *   Utils.java *   images/jpgIcon.gif (required by ImageFileView.java) *   images/gifIcon.gif (required by ImageFileView.java) *   images/tiffIcon.gif (required by ImageFileView.java) *   images/pngIcon.png (required by ImageFileView.java) */public class FileChooserDemo2 extends JPanel                              implements ActionListener {    static private String newline = "\n";    private JTextArea log;    private JFileChooser fc;    public FileChooserDemo2() {        super(new BorderLayout());        //Create the log first, because the action listener        //needs to refer to it.        log = new JTextArea(5,20);        log.setMargin(new Insets(5,5,5,5));        log.setEditable(false);        JScrollPane logScrollPane = new JScrollPane(log);        JButton sendButton = new JButton("Attach...");        sendButton.addActionListener(this);        add(sendButton, BorderLayout.PAGE_START);        add(logScrollPane, BorderLayout.CENTER);    }    public void actionPerformed(ActionEvent e) {        //Set up the file chooser.        if (fc == null) {            fc = new JFileChooser();	    //Add a custom file filter and disable the default	    //(Accept All) file filter.            fc.addChoosableFileFilter(new ImageFilter());            fc.setAcceptAllFileFilterUsed(false);	    //Add custom icons for file types.            fc.setFileView(new ImageFileView());	    //Add the preview pane.            fc.setAccessory(new ImagePreview(fc));        }        //Show it.        int returnVal = fc.showDialog(FileChooserDemo2.this,                                      "Attach");        //Process the results.        if (returnVal == JFileChooser.APPROVE_OPTION) {            File file = fc.getSelectedFile();            log.append("Attaching file: " + file.getName()                       + "." + newline);        } else {            log.append("Attachment cancelled by user." + newline);        }        log.setCaretPosition(log.getDocument().getLength());        //Reset the file chooser for the next time it's shown.        fc.setSelectedFile(null);    }    /**     * Create the GUI and show it.  For thread safety,     * this method should be invoked from the     * event-dispatching thread.     */    private static void createAndShowGUI() {        //Make sure we have nice window decorations.        JFrame.setDefaultLookAndFeelDecorated(true);        JDialog.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.        JFrame frame = new JFrame("FileChooserDemo2");        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.        JComponent newContentPane = new FileChooserDemo2();        newContentPane.setOpaque(true); //content panes must be opaque        frame.setContentPane(newContentPane);        //Display the window.        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        //Schedule a job for the event-dispatching thread:        //creating and showing this application's GUI.        javax.swing.SwingUtilities.invokeLater(new Runnable() {            public void run() {                createAndShowGUI();            }        });    }}