Notepad.java

package notepad;

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

public class Notepad extends JFrame implements ActionListener {
    JTextArea area;
    String text;
    
    Notepad(){
        setTitle("Notepad");
        
        ImageIcon notepadIcon=new ImageIcon(ClassLoader.getSystemResource("notepad/icons/notepad.png"));
        Image icon=notepadIcon.getImage();
        setIconImage(icon);
        
        JMenuBar menubar = new JMenuBar();
        menubar.setBackground(Color.WHITE);
        
        JMenu file = new JMenu("File");
        file.setFont(new Font("AERIAL",Font.PLAIN,14));
        
        JMenuItem newdoc = new JMenuItem("NEW");
        newdoc.addActionListener(this);
        newdoc.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,ActionEvent.CTRL_MASK));
        
        JMenuItem open = new JMenuItem("Open");
        open.addActionListener(this);
        open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,ActionEvent.CTRL_MASK));
        
        JMenuItem save = new JMenuItem("Save");
        save.addActionListener(this);
        save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.CTRL_MASK));
        
        JMenuItem print = new JMenuItem("Print");
        print.addActionListener(this);
        print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P,ActionEvent.CTRL_MASK));
        
        JMenuItem exit = new JMenuItem("Exit");
        exit.addActionListener(this);
        exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE,ActionEvent.CTRL_MASK));
        
        file.add(newdoc);
        file.add(open);
        file.add(save);
        file.add(print);
        file.add(exit);
        
        menubar.add(file);
        
         JMenu edit = new JMenu("Edit");
        edit.setFont(new Font("AERIAL",Font.PLAIN,14));
        
        JMenuItem copy = new JMenuItem("Copy");
        copy.addActionListener(this);
        copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK));
        
        JMenuItem paste = new JMenuItem("Paste");
        paste.addActionListener(this);
        paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,ActionEvent.CTRL_MASK));
        
        JMenuItem cut = new JMenuItem("Cut");
        cut.addActionListener(this);
        cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,ActionEvent.CTRL_MASK));
        
        JMenuItem selectAll = new JMenuItem("Selectall");
        selectAll.addActionListener(this);
        selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,ActionEvent.CTRL_MASK));
        
        edit.add(copy);
        edit.add(paste);
        edit.add(cut);
        edit.add(selectAll);
        
        menubar.add(edit);
        
        JMenu helpmenu = new JMenu("Help");
        helpmenu.setFont(new Font("AERIAL",Font.PLAIN,14));
        
        JMenuItem help = new JMenuItem("About");
        help.addActionListener(this);
        help.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H,ActionEvent.CTRL_MASK));
        
        helpmenu.add(help);
        
        menubar.add(helpmenu);
        
        setJMenuBar(menubar);
        
        area =new JTextArea();
        area.setFont(new Font("SAN_SERIF",Font.PLAIN,18));
        area.setLineWrap(true);
        area.setWrapStyleWord(true);
        
        JScrollPane pane =new JScrollPane(area);
        pane.setBorder(BorderFactory.createEmptyBorder());
        add(pane);
                
        setExtendedState(JFrame.MAXIMIZED_BOTH);
        
        setVisible(true);
    }
    @Override
    public void actionPerformed(ActionEvent ae){
        if(ae.getActionCommand().equals("New")){
        area.setText(" ");
        }else if(ae.getActionCommand().equals("Open")){
            JFileChooser chooser = new JFileChooser();
            chooser.setAcceptAllFileFilterUsed(false);
            FileNameExtensionFilter restrict = new FileNameExtensionFilter("Only .txt files","txt");
            chooser.addChoosableFileFilter(restrict);
            
            int action = chooser.showOpenDialog(this);
            
            if (action !=JFileChooser.APPROVE_OPTION){ 
                return;
          }
            File file =chooser.getSelectedFile();
            try{
                BufferedReader reader=new BufferedReader(new FileReader(file));
                area.read(reader, null); 
            } catch (Exception e){
               e.printStackTrace();
        }
      }else if (ae.getActionCommand().equals("Save")){
          JFileChooser saveas = new JFileChooser();
          saveas.setApproveButtonText("Save");
          
          int action =saveas.showOpenDialog(this);
          
          if(action!=JFileChooser.APPROVE_OPTION){
              return;
      }
          File filename=new File(saveas.getSelectedFile()+".txt");
          BufferedWriter outFile=null;
          try{
              outFile = new BufferedWriter(new FileWriter(filename));
              area.write(outFile);
          } catch (Exception e){
              e.printStackTrace();
         }
      } else if(ae.getActionCommand().equals("Print")){
          try{
              area.print();
          } catch (Exception e){
              e.printStackTrace();
      }
    } else if(ae.getActionCommand().equals("Exit")){
        System.exit(0);
    }
    else if(ae.getActionCommand().equals("Copy")){
        text=area.getSelectedText();
  } else if(ae.getActionCommand().equals("Paste")){
      area.insert(text, area.getCaretPosition());
  } else if(ae.getActionCommand().equals("Cut")){
      text=area.getSelectedText();
      area.replaceRange("", area.getSelectionStart(), area.getSelectionEnd());
  }else if(ae.getActionCommand().equals("Select All")){
      area.selectAll();
      }
  else if(ae.getActionCommand().equals("About")){
      new About().setVisible(true);
    }
    }
    public static void main(String[] args) {
        new Notepad();
    }  
}