Creating Menuitem from Action class : JMenuItem « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JMenuItem

The mnemonic for a menu item usually appears underlined within the text label for the menu

class ShowAction extends AbstractAction {
  Component parentComponent;

  public ShowAction(Component parentComponent) {
    super("About");
    putValue(Action.MNEMONIC_KEY, new Integer(KeyEvent.VK_A));
    this.parentComponent = parentComponent;
  }

  public void actionPerformed(ActionEvent actionEvent) {
        JOptionPane.showMessageDialog(parentComponent, "About Swing", "About Box V2.0",
            JOptionPane.INFORMATION_MESSAGE);
  }
}

public class ContructMenuWithAction {
  public static void main(final String args[]) {
    JFrame frame = new JFrame("MenuSample Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JMenuBar menuBar = new JMenuBar();

    // File Menu, F - Mnemonic
    JMenu fileMenu = new JMenu("File");
    fileMenu.setMnemonic(KeyEvent.VK_F);
    menuBar.add(fileMenu);

    // File->New, N - Mnemonic
    JMenuItem newMenuItem = new JMenuItem(new ShowAction(frame));
    fileMenu.add(newMenuItem);

    frame.setJMenuBar(menuBar);
    frame.setSize(350, 250);
    frame.setVisible(true);
  }
}

14.23.JMenuItem
	14.23.1.	Creating JMenuItem Components
	14.23.2.	Creating Menuitem from Action class
	14.23.3.	Adding Drop-Down Menus
	14.23.4.	Disable Menuitem
	14.23.5.	Adding Mnemonic and Accelerator to Menuitem
	14.23.6.	Using Function key as Accelerator
	14.23.7.	Listening to JMenuItem Events with an ActionListener
	14.23.8.	Listening to JMenuItem Events with a MenuDragMouseListener
	14.23.9.	Listening to JMenuItem Events with a MenuKeyListener
	14.23.10.	Separating Menu Items in a Menu
	14.23.11.	Creating an About Menu Item
	14.23.12.	Creating a Menu Item That Listens for Changes to Its Selection Status
	14.23.13.	Customizing JMenuItem Look and Feel