import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class Notepad extends JFrame {
	JTextArea txtNote = new JTextArea(24, 60);
	JButton btnClose = new JButton("Close");
	JPanel pnlButton = new JPanel();
	JLabel lblFile = new JLabel("Filename:");
	JTextField txtFile = new JTextField("<untitled>");
	Box box = new Box(BoxLayout.X_AXIS);
	JMenuBar mnuBar = new JMenuBar();
	JMenu mnuFile = new JMenu("File");
	JMenuItem mnuOpen = new JMenuItem("Open");
	JMenuItem mnuExit = new JMenuItem("Exit");

	public Notepad(){
		super("Notepad");
		addComponents();
		addEvents();
		setSize(400, 300);
		setVisible(true);
	}

	public void addComponents(){
		Container contentPane = getContentPane();

		contentPane.add(txtNote, BorderLayout.CENTER);
		contentPane.add(box, BorderLayout.SOUTH);

		box.add(lblFile);
		box.add(txtFile);
		box.add(btnClose);

		txtFile.setEditable(false);

		mnuBar.add(mnuFile);
		mnuFile.add(mnuOpen);
		mnuFile.addSeparator();
		mnuFile.add(mnuExit);
		this.setJMenuBar(mnuBar);

	}

	public void addEvents(){
		mnuExit.addActionListener(new CloseNoteListener());
		btnClose.addActionListener(new CloseNoteListener());
		mnuOpen.addActionListener(new OpenListener(this));
	}

	public static void main(String[] args) {
		new Notepad();
	}
}


class CloseNoteListener implements ActionListener {
	public void actionPerformed(ActionEvent e) {
		System.exit(0);
	}
}

class OpenListener implements ActionListener {
	Notepad note;

	public OpenListener(Notepad n){
		note = n;
	}

	public void actionPerformed(ActionEvent e) {
		JFileChooser fc = new JFileChooser(".");
		int result = fc.showOpenDialog(note);
		if (result==JFileChooser.APPROVE_OPTION) {
			File f = fc.getSelectedFile();
			note.txtFile.setText(f.getName());
		}
	}
}