$4.$ Create a new package inside your project called view.

$5.$ In the view package create a class called MainWindow and make it inherit from the

JFrame class.

$6.$ In the MainWindow class create the following private attributes:

$$ JDesktopPane desktop

$$ JMenuBar menuBar

$$ JMenu file $($Menu title should be $$File$)$

$$ JMenu edit $($Menu title should be $$Edit$)$

$$ JMenuItem menuItemTextDocument $($Menu item title should be $$Text

Document$)$

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$$ JMenuItem menuItemSpreadSheet $($Menu item title should be $$Spreadsheet$)$

$$ JMenuItem menuItemSave $($Menu item title should be $$Save$)$

$$ MenuItem menuAbout $($Menu item title should be $$About$)$

$$ MenuItem menuOpen $($Menu item title should be $$Open$)$

$$ MenuItem menuClose $($Menu item title should be $$Close$)$

$$ TrayIcon trayIcon

$$ PopupMenu popup.

$7.$ In the MainWindow class create the following methods $($all methods will have a return

type of void and accept no parameters$)$:

$$ initializeComponents$(),$

$$ addMenuItemsToPopup$(),$

$$ addMenuItemsToMenu$(),$

$$ addMenusToMenuBar$(),$

$$ addComponentsToWindow$(),$

$$ setWindowProperties$()$

$$ registerListeners$()$

$8.$ In the initializeComponents method initialize each of the private attributes using either

the default or primary constructor.

$$ Use the setMnemonic method inside the file menu object to bind the letter A to

the file menu option and

$$ Use the setMnemonic method inside the edit menu object to bind the letter S to

the edit menu option.

$$ Use the setToolTipText method inside the save menu item object to set the tooltip

text "Saves the active document" for the save menu item.

$$ Use the setPopupMenu method from the TrayIcon class to add the PopupMenu

to the trayIcon variable. Please note that the image to be used for the tray icon

will be the one you downloaded.

$9.$ Inside the addMenuItemsToPopup method add the following to the PopupMenu:

$$ menuAbout,

$$ menuOpen

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$$ menuClose

$($There exists an add method inside the PopupMenu class$).$

$10.$Inside the addMenuItemsToMenu method:

$$ add the menuItemTextDocument and menuItemSpreadSheet to the file menu.

$$ add the menuItemSave to the edit menu.

$($There exists an add method inside the JMenu class$).$

$11.$ Inside the addMenusToMenuBar method add the file and edit menu to the menuBar.

$($There exists an add method inside the JMenuBar class$).$

$12.$ Inside the addComponentsToWindow method add the desktop pane to the JFrame.

Create two new classes SpreadSheetDocumentFrame and TextDocumentFrame inside

your view package. Both classes should inherit from JInternalFrame. Both classes

should have only one private attribute of type JTextArea. Create an intializeComponent

method that initializes the text area $($you can use either the default or primary

constructor$),$ then create an addComponentsToWindow inside of which you need to add

the text area to the frame.

$15.$ Inside both newly created classes, create a setWindowsProperties method $($no

parameters and return type void$)$ and set the window size to be width $300$ and height

$300$ and visibility to be true.

$16.$ For both classes created above create a default constructor that will call the parents

primary constructor $($please use the following primary constructor super$($FRAME

TITLE, true, true, true, true$)$ and swap out the frame title with any title you wish$)$ and

then call the other created methods.