Chapter 13, Problem 11AW

Explanation of Solution

Menu Bar:

• It is used to create a menu bar.
  • The menu bar is placed at the top of window.
  • The menu bar lists the one or more menu names.
• The menu bar object is able to handle menu objects.
  • Create the needed menu objects, and add them to the object of menu bar.
• User can create the menu bar using “JMenuBar” class.

Menus:

• Menus is used to create a drop-down list menu items.
  • User can create a menu using “JMenu” class.
• A menu can contain
  • Menu items – it is used to create an ordinary menu item.
    • User can create a menu items using “JMenuItem” class.
  • Checked menu items – it is used to create a check menu item.
    • User can create a checked menu item using “JCheckMenuItem” class.
  • Radio button menu items – it is used to create a radio button menu item.
    • User can create a radio button menu items using “JRadioButtonMenuItem” class.
  • Other menus.

Mnemonics:

• A mnemonics is a key on the keyboard.
  • Clicking a button using mnemonic.
  • To click a button, user can press keyboard in combination with the “Alt” key.
  • It is also referred to as “shortcut keys”, “access keys”, or “hot keys”.
• User can assign a mnemonic to a component using the component method called “setMnemonic”.
  • This method takes the parameter of “key” that is by using “KeyEvent” class. Example for this “KeyEvent.VK_x”.
    • “VK” is the virtual key and in the place of “x” user need to put a key on the keyboard.
    • After creating this, user may click the given button by using “+x” on the keyboard.

Creating a menu bar with one menu:

//Create a menu item for Open

JMenuItem openMenuItem = new JMenuItem("Open");

//Assign mnemonic for open menu item

openMenuItem.setMnemonic(KeyEvent.VK_O);

//Register action listener for Open menu item

openMenuItem.addActionListener(new OpenListener());

//Create a menu item for Print

JMenuItem printMenuItem = new JMenuItem("Print");

//Assign mnemonic for print menu item

printMenuItem...