import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* Demonstrate JMenu shortcuts and accelerators.
*
* @author Ian Darwin, ian@darwinsys.com
* @version $Id: MenuShortcuts.java,v 1.3 2000/11/25 17:55:17 ian Exp $
*/
public class MenuShortcuts extends JFrame implements ActionListener {
/** The menubar */
JMenuBar mb;
/** File, Options, Help */
JMenu fm, om, hm;
/** Options Sub-JMenu */
JMenu opSubm;
/** The JMenuItem for exiting. */
JMenuItem exitItem;
// Constructor
MenuShortcuts(String s) {
super("JMenuShortcuts: " + s);
mb = new JMenuBar();
setJMenuBar(mb); // Frame implements JMenuContainer
Container cp = getContentPane();
JMenuItem mi;
// The File JMenu...
fm = new JMenu("File");
fm.setMnemonic('F');
fm.add(mi = new JMenuItem("Open", 'O'));
mi.addActionListener(this);
fm.add(mi = new JMenuItem("Close", 'W'));
mi.addActionListener(this);
fm.addSeparator();
fm.add(mi = new JMenuItem("Print", 'P'));
mi.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_R, Event.ALT_MASK));
mi.addActionListener(this);
fm.addSeparator();
fm.add(mi = new JMenuItem("Exit", 'Q'));
exitItem = mi; // save for action handler
mi.addActionListener(this);
mb.add(fm);
// The Options JMenu...
om = new JMenu("Options");
om.add(new JMenuItem("Alpha"));
om.add(new JMenuItem("Gamma"));
om.add(new JMenuItem("Delta"));
mb.add(om);
// The Help JMenu...
hm = new JMenu("Help");
hm.add(mi = new JMenuItem("About"));
mi.addActionListener(this);
hm.add(mi = new JMenuItem("Topics"));
mi.addActionListener(this);
mb.add(hm);
// mb.setHelpMenu(hm); // needed for portability (Motif, etc.).
// the main window
cp.add(new MyLabel("Menu Demo Window", 200, 150));
pack();
}
/** Handle action events. */
public void actionPerformed(ActionEvent evt) {
// System.out.println("Event " + evt);
String cmd;
if ((cmd = evt.getActionCommand()) == null)
System.out.println("You chose a menu shortcut");
else
System.out.println("You chose " + cmd);
Object cmp = evt.getSource();
// System.out.println("Source " + cmp);
if (cmp == exitItem)
System.exit(0);
}
public static void main(String[] arg) {
new MenuShortcuts("Testing 1 2 3...").setVisible(true);
}
}
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