JMenuItem Example in Java

 import java.awt.*; 
 import javax.swing.*; 
 import java.awt.event.*; 
 public class JavaExampleMenuUpdateInJApplet extends JApplet implements ActionListener 
      { 
          JMenuBar MnuBar = new JMenuBar(); 
          JMenu MnuOne = new JMenu("File"); 
          JMenu MnuTwo = new JMenu("Edit"); 
          JMenuItem MnuItmOne = new JMenuItem("New..."), 
          MnuItmTwo = new JMenuItem("Open..."), 
          MnuItmThree = new JMenuItem("Exit"), 
          MnuItmFour = new JMenuItem("Add item"), 
          MnuItmFive = new JMenuItem("Remove item"), 
          MnuItmSix = new JMenuItem("New item"); 
          public void init() 
            { 
               MnuOne.add(MnuItmOne); 
               MnuOne.add(MnuItmTwo); 
               MnuOne.addSeparator(); 
               MnuOne.add(MnuItmThree); 
               MnuItmOne.setActionCommand("You selected New"); 
               MnuItmTwo.setActionCommand("You selected Open"); 
               MnuItmOne.addActionListener(this); 
               MnuItmTwo.addActionListener(this); 
               MnuTwo.add(MnuItmFour); 
               MnuTwo.add(MnuItmFive); 
               MnuItmFour.setActionCommand("You selected Cut"); 
               MnuItmFive.setActionCommand("You selected Copy"); 
               MnuItmFour.addActionListener(this); 
               MnuItmFive.addActionListener(this); 
               MnuBar.add(MnuOne); 
               MnuBar.add(MnuTwo); 
               setJMenuBar(MnuBar); 
            } 
               public void actionPerformed(ActionEvent e1) 
               { 
                  JMenuItem MnuItem = (JMenuItem)e1.getSource(); 
                  if(MnuItem == MnuItmFour) 
                { 
                       MnuTwo.add(MnuItmSix); 
                    } 
                       if(MnuItem == MnuItmFive) 
                     { 
                            MnuTwo.remove(MnuItmSix); 
                         } 
               } 
   } 
 /*<APPLET CODE =JavaExampleMenuUpdateInJApplet.class WIDTH = 350  HEIGHT = 280 ></APPLET>*/