Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.io.File;
import java.util.Collections;
import java.util.Vector;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;

public class Main {
    public static void main(final String[] av) {
        JFrame frame = new JFrame();
        Container cp = frame.getContentPane();
        cp.add(new FileTree(new File(".")));
        frame.pack();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

class FileTree extends JPanel {
    public FileTree(File dir) {
        setLayout(new BorderLayout());
        JTree tree = new JTree(addNodes(null, dir));
        tree.addTreeSelectionListener(e -> {
            DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.getPath().getLastPathComponent();
            System.out.println("You selected " + node);
        });
        DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer) tree.getCellRenderer();
        JScrollPane scrollpane = new JScrollPane();
        scrollpane.getViewport().add(tree);
        add(BorderLayout.CENTER, scrollpane);
    }

    private DefaultMutableTreeNode addNodes(DefaultMutableTreeNode curTop, File dir) {
        String curPath = dir.getPath();
        DefaultMutableTreeNode curDir = new DefaultMutableTreeNode(curPath);
        if (curTop != null) {
            curTop.add(curDir);
        }
        Vector<String> ol = new Vector<String>();
        String[] tmp = dir.list();
        for (int i = 0; i < tmp.length; i++) {
            ol.addElement(tmp[i]);
        }
        Collections.sort(ol, String.CASE_INSENSITIVE_ORDER);
        File f;
        Vector<Object> files = new Vector<Object>();
        for (int i = 0; i < ol.size(); i++) {
            String thisObject = ol.elementAt(i);
            String newPath;
            if (curPath.equals(".")) {
                newPath = thisObject;
            } else {
                newPath = curPath + File.separator + thisObject;
            }
            if ((f = new File(newPath)).isDirectory()) {
                addNodes(curDir, f);
            } else {
                files.addElement(thisObject);
            }
        }
        for (int fnum = 0; fnum < files.size(); fnum++) {
            curDir.add(new DefaultMutableTreeNode(files.elementAt(fnum)));
        }
        return curDir;
    }

    @Override
    public Dimension getMinimumSize() {
        return new Dimension(200, 400);
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(200, 400);
    }
}