File Explorer using Java - how to go about it?

Question

I am set to create a file explorer using Java. The aim is to emulate the behavior of the default explorer as closely as possible, whatever may be the underlying OS.

Answer 1

I'd start with How to Use File Choosers, but the example in org.netbeans.swing.outline.Outline, discussed here, is appealing.

Addendum: @Gilbert Le Blanc raises an excellent point about the ease & portability of Swing. In contrast, SWT requires slightly more effort to deploy, but some users prefer the greater fidelity of org.eclipse.swt.widgets.FileDialog, as shown here.

Addendum: I notice that FileDialog displays a more native-looking window, as seen here. You might try it on your target platform(s).

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

/** @see https://stackoverflow.com/questions/2914733 */
public class FileDialogTest {

    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new GridLayout(0, 1));
        frame.add(new JButton(new AbstractAction("Load") {

            @Override
            public void actionPerformed(ActionEvent e) {
                FileDialog fd = new FileDialog(frame, "Test", FileDialog.LOAD);
                fd.setVisible(true);
                System.out.println(fd.getFile());
            }
        }));
        frame.add(new JButton(new AbstractAction("Save") {

            @Override
            public void actionPerformed(ActionEvent e) {
                FileDialog fd = new FileDialog(frame, "Test", FileDialog.SAVE);
                fd.setVisible(true);
                System.out.println(fd.getFile());
            }
        }));
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Answer 2

You would be better off using Swing. You need different versions of SWT and JFace for different operating systems.

The best approach is to start off simple, and add to what you have as you learn more.

To get you started, you need a JFrame with two JPanel children.

You'll need to add a JMenuBar to the JFrame. JMenu items are added to the JMenuBar. JMenuItem items are added to the JMenu.

Oracle's Swing Overview will help you add more Swing components to your project.