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Notepad Code in Swing:-






  
package awtexample;

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

/**
 *
 * @author Hp
 */
public class Notepad extends javax.swing.JFrame {

    /**
     * Creates new form Notepad
     */
    public Notepad() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                         
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jCheckBoxMenuItem1 = new javax.swing.JCheckBoxMenuItem();
        jCheckBoxMenuItem2 = new javax.swing.JCheckBoxMenuItem();
        jCheckBoxMenuItem4 = new javax.swing.JCheckBoxMenuItem();
        jCheckBoxMenuItem5 = new javax.swing.JCheckBoxMenuItem();
        jCheckBoxMenuItem3 = new javax.swing.JCheckBoxMenuItem();
        jMenu2 = new javax.swing.JMenu();
        jMenuItem2 = new javax.swing.JMenuItem();
        jMenuItem1 = new javax.swing.JMenuItem();
        jMenuItem3 = new javax.swing.JMenuItem();
        jMenuItem4 = new javax.swing.JMenuItem();
        jMenu3 = new javax.swing.JMenu();
        jMenu4 = new javax.swing.JMenu();
        jMenu5 = new javax.swing.JMenu();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        jMenu1.setText("File");
        jMenu1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenu1ActionPerformed(evt);
            }
        });

        jCheckBoxMenuItem1.setSelected(true);
        jCheckBoxMenuItem1.setText("New");
        jMenu1.add(jCheckBoxMenuItem1);

        jCheckBoxMenuItem2.setSelected(true);
        jCheckBoxMenuItem2.setText("Open");
        jCheckBoxMenuItem2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jCheckBoxMenuItem2ActionPerformed(evt);
            }
        });
        jMenu1.add(jCheckBoxMenuItem2);

        jCheckBoxMenuItem4.setSelected(true);
        jCheckBoxMenuItem4.setText("Save");
        jCheckBoxMenuItem4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jCheckBoxMenuItem4ActionPerformed(evt);
            }
        });
        jMenu1.add(jCheckBoxMenuItem4);

        jCheckBoxMenuItem5.setSelected(true);
        jCheckBoxMenuItem5.setText("Save As");
        jMenu1.add(jCheckBoxMenuItem5);

        jCheckBoxMenuItem3.setSelected(true);
        jCheckBoxMenuItem3.setText("Print");
        jMenu1.add(jCheckBoxMenuItem3);

        jMenuBar1.add(jMenu1);

        jMenu2.setText("Edit");

        jMenuItem2.setText("Cut");
        jMenuItem2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem2ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem2);

        jMenuItem1.setText("Copy");
        jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem1ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem1);

        jMenuItem3.setText("Paste");
        jMenuItem3.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem3ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem3);

        jMenuItem4.setText("Select All");
        jMenuItem4.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jMenuItem4ActionPerformed(evt);
            }
        });
        jMenu2.add(jMenuItem4);

        jMenuBar1.add(jMenu2);

        jMenu3.setText("View");
        jMenuBar1.add(jMenu3);

        jMenu4.setText("Format");
        jMenuBar1.add(jMenu4);

        jMenu5.setText("Help");
        jMenuBar1.add(jMenu5);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 1102, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 581, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(0, 0, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                       

    private void jMenu1ActionPerformed(java.awt.event.ActionEvent evt) {                                      
        // TODO add your handling code here:
        jTextArea1.setText("");
    }                                     

    private void jCheckBoxMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                                  
          try
        { 
        JFileChooser jf = new JFileChooser();
        jf.showSaveDialog(this);
        File f =  new File(jf.getSelectedFile().toString());
        FileReader fw = new FileReader(f);
        BufferedReader bw = new BufferedReader(fw);
        String s="";
        String s1="";
        while((s1=bw.readLine())!=null)
        {
            s+=s1;
        }
        jTextArea1.setText(s);
        bw.close();
       
        }
        catch(Exception ex)
        {
           
        }
    }                                                 

    private void jCheckBoxMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {                                                  
        try
        { 
        JFileChooser jf = new JFileChooser();
        jf.showSaveDialog(this);
        File f =  new File(jf.getSelectedFile().toString());
        FileWriter fw = new FileWriter(f);
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write(jTextArea1.getText());
        bw.close();
       
        }
        catch(Exception ex)
        {
           
        }
    }                                                 

    private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        jTextArea1.cut();
    }                                         

    private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        jTextArea1.copy();
    }                                         

    private void jMenuItem3ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        jTextArea1.paste();
    }                                         

    private void jMenuItem4ActionPerformed(java.awt.event.ActionEvent evt) {                                          
        // TODO add your handling code here:
        jTextArea1.selectAll();
    }                                         

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Notepad.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Notepad.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Notepad.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Notepad.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Notepad().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                    
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem1;
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem2;
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem3;
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem4;
    private javax.swing.JCheckBoxMenuItem jCheckBoxMenuItem5;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenu jMenu3;
    private javax.swing.JMenu jMenu4;
    private javax.swing.JMenu jMenu5;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JMenuItem jMenuItem4;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    // End of variables declaration                  
}



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