import java.io.*;
import java.util.*;
import javax.swing.*;

/**
 * @version 1.0 2002-11-23
 * @author Takashi KOBAYASHI
 */
public class memo10ex3 {
	public static void main( String[] args ) {
		memo10ex3 ex3 = new memo10ex3();
	}

	public memo10ex3() {
		File root = new File("./root");
		Hashtable ret = new Hashtable();

		if( root.isDirectory() )
			ret.put( new NodeWrapper( root ), getChildren( root ) );
		else
			ret.put( new NodeWrapper( root ), root );
		JTree tree = new JTree( ret );

		JFrame frame = new JFrame( "memo10ex3" );
		frame.getContentPane().add( tree );

		frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
		frame.pack();
		frame.setVisible( true );
	}

	public Hashtable getChildren( File parent ) {
		File[] files = parent.listFiles();
		Hashtable ret = new Hashtable();
		for( int i = 0; i < files.length; i++ ) {
			if( files[i].isDirectory() )
				ret.put( new NodeWrapper( files[i] ), getChildren( files[i] ) );
			else
				ret.put( new NodeWrapper( files[i] ), files[i] );
		}
		return ret;
	}

	class NodeWrapper {
		File file;
		public NodeWrapper( File f ) {
			file = f;
		}
		public String toString() {
			return file.getName();
		}
	}
}