PBO-C 10 : TextEditor

import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.plaf.metal.*;
import javax.swing.text.*;

public class TextEditor extends JFrame implements ActionListener
{
    // Text component

    JTextArea t;

    // Frame

    JFrame f;

    // Constructor

    TextEditor()
    {
        // Create a frame

        f = new JFrame("Text Editor");

        try
        {
            // Set metal look and feel

            UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");

            // Set theme to ocean

            MetalLookAndFeel.setCurrentTheme(new OceanTheme());
        } catch (Exception e) {

        }

        // Text component

        t = new JTextArea();

        // Create a menubar

        JMenuBar mb = new JMenuBar();

        // Create a menu for menu

        JMenu m1 = new JMenu("File");

        // Create menu items

        JMenuItem mi1 = new JMenuItem("New");
        JMenuItem mi2 = new JMenuItem("Open");
        JMenuItem mi3 = new JMenuItem("Save");
        JMenuItem mi9 = new JMenuItem("Print");

        // Add action listener

        mi1.addActionListener(this);
        mi2.addActionListener(this);
        mi3.addActionListener(this);
        mi9.addActionListener(this);

        m1.add(mi1);
        m1.add(mi2);
        m1.add(mi3);
        m1.add(mi9);

        // Create a menu for menu

        JMenu m2 = new JMenu("Edit");

        // Create menu items

        JMenuItem mi4 = new JMenuItem("Cut");
        JMenuItem mi5 = new JMenuItem("Copy");
        JMenuItem mi6 = new JMenuItem("Paste");

        // Add action listener

        mi4.addActionListener(this);
        mi5.addActionListener(this);
        mi6.addActionListener(this);

        m2.add(mi4);
        m2.add(mi5);
        m2.add(mi6);

        JMenuItem mc = new JMenuItem("Close");

        mc.addActionListener(this);

        mb.add(m1);
        mb.add(m2);
        mb.add(mc);

        f.setJMenuBar(mb);
        f.add(t);
        f.setSize(500, 500);
        f.show();
    }

    public void actionPerformed(ActionEvent e)
    {
        String s = e.getActionCommand().toLowerCase();

        if (s.equals("cut"))
        {
            t.cut();
        } else if (s.equals("copy")) {
            t.copy();
        } else if (s.equals("paste")) {
            t.paste();
        } else if (s.equals("save")) {
            // Create an object of JFileChooser class

            JFileChooser j = new JFileChooser("c:");

            // Invoke the showSaveDialog function to show the save dialog

            int r = j.showSaveDialog(null);

            if (r == JFileChooser.APPROVE_OPTION) {
                // Set the label to the path of the selected directory

                File fi = new File(j.getSelectedFile().getAbsolutePath());

                try
                {
                    // Create a file writer

                    FileWriter wr = new FileWriter(fi, false);

                    // Create buffered writer to write

                    BufferedWriter w = new BufferedWriter(wr);

                    // Write

                    w.write(t.getText());

                    w.flush();
                    w.close();
                } catch (Exception evt) {
                    JOptionPane.showMessageDialog(f, evt.getMessage());
                }
            } else JOptionPane.showMessageDialog(f, "The user cancelled the operation"); // If the user cancelled the operation
        } else if (s.equals("print")) {
            try {
                // Print the file

                t.print();
            } catch (Exception evt) {
                JOptionPane.showMessageDialog(f, evt.getMessage());
            }
        } else if (s.equals("open")) {
            // Create an object of JFileChooser class

            JFileChooser j = new JFileChooser("c:");

            // Invoke the showOpenDialog function to show the open dialog

            int r = j.showOpenDialog(null);

            // If the user selects a file

            if (r == JFileChooser.APPROVE_OPTION)
            {
                // Set the label to the path of the selected directory

                File fi = new File(j.getSelectedFile().getAbsolutePath());

                try
                {
                    // String

                    String s1 = "", sl = "";

                    // File reader

                    FileReader fr = new FileReader(fi);

                    // Buffered reader

                    BufferedReader br = new BufferedReader(fr);

                    // Initialize sl

                    sl = br.readLine();

                    // Take the input from the file

                    while ((s1 = br.readLine()) != null)
                    {
                        sl = sl + "\n" + s1;
                    }

                    // Set the text

                    t.setText(sl);
                } catch (Exception evt) {
                    JOptionPane.showMessageDialog(f, evt.getMessage());
                }
            } else JOptionPane.showMessageDialog(f, "The user cancelled the operation"); // If the user cancelled the operation
        } else if (s.equals("new")) {
            t.setText("");
        } else if (s.equals("close")) {
            f.setVisible(false);
        }
    }

    public static void main(String[] args)
    {
        TextEditor te = new TextEditor();
    }
}