Removing Exit Menu Item from the File Menu

 //File -> Exit.
    if (!thisIsAMac) {
        new MenuItem(menu, SWT.SEPARATOR);
  
        //File -> Exit.
      subItem = new MenuItem(menu, SWT.NULL);
      subItem.setText(resAddressBook.getString("Exit"));
      subItem.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent e) {
          shell.close();
        }
      });
    }