Calculator menu button layout as well as some MenuBar menuBar Menu menu1, menu2, menu3 MenuItem menu1_item1, menu1_item2, menu1_item3 MenuItem menu2_item1, menu2_item2 MenuItem menu3_item1, menu3_item2 mywindow () (setTitle ( Calculator ) menuBar = new MenuBar () menu1 = new Menu ( file ) menu2 = new Menu ( Basic Operation ) menu3 = new Menu ( Help ) menuBar.add (menu1) menuBar.add (menu2)

final.java

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