Setting a Keyboard Accelerator for a Menu Item 
At least one menu in a menu bar should have a mnemonic. This makes all the menus and menu items accessible. 

    
 JMenuItem item = new JMenuItem("Item");
 
 //The next two lines should be in one line.
 item.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.
   VK_I, KeyEvent.SHIFT_MASK));