Using Menus in an Application

Figures 22.5–22.6 demonstrate various menu items and how to specify special characters called mnemonics that can provide quick access to a menu or menu item from the keyboard. Mnemonics can be used with all subclasses of javax.swing.AbstractButton. Class MenuFrame (Fig. 22.5) creates the GUI and handles the menu-item events. Most of the code in this application appears in the class’s constructor (lines 34–151).

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 1   // Fig. 22.5: MenuFrame.java 2   // Demonstrating menus. 3   import java.awt.Color; 4   import java.awt.Font; 5   import java.awt.BorderLayout; 6   import java.awt.event.ActionListener; 7   import java.awt.event.ActionEvent; 8   import java.awt.event.ItemListener; 9    ...

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