JMenuBar در جاوا (JMenuBar in java)

class MenuExample implements ActionListener {
     JMenu menu, submenu;
     JMenuItem i1, i2, i3, i4, i5;

     MenuExample() {
          JFrame f = new JFrame("Menu and MenuItem Example");
          JMenuBar mb = new JMenuBar();
          menu = new JMenu("Menu");
          submenu = new JMenu("Sub Menu");
          i1 = new JMenuItem("Item 1");
          i2 = new JMenuItem("Item 2");
          i3 = new JMenuItem("Item 3");
          i4 = new JMenuItem("Item 4");
          i5 = new JMenuItem("Item 5");
         
          i1.addActionListener(this);
          i2.addActionListener(this);
          i3.addActionListener(this);
          i4.addActionListener(this);
          i5.addActionListener(this);
         
          menu.add(i1);
          menu.add(i2);
          menu.add(i3);
          submenu.add(i4);
          submenu.add(i5);
          menu.add(submenu);
          mb.add(menu);
          f.setJMenuBar(mb);
          f.setSize(400, 400);
          f.setLayout(null);
          f.setVisible(true);
     }
    
     @Override
     public void actionPerformed(ActionEvent e) {
          if (e.getSource() == i1)
              System.out.println("Item 1 Clicked!");
          if (e.getSource() == i2)
              System.out.println("Item 2 Clicked!");
          if (e.getSource() == i3)
              System.out.println("Item 3 Clicked!");
          if (e.getSource() == i4)
              System.out.println("Item 4 Clicked!");
          if (e.getSource() == i5)
              System.out.println("Item 5 Clicked!");        
     }
    
     public static void main(String args[]) {
          new MenuExample();
     }


}