/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.i18n;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.util.Locale;import java.util.ResourceBundle;import java.util.MissingResourceException;/** A convenience class to automatically create localized menu panes */public class SimpleMenu {    /** The convenience method that creates menu panes */    public static JMenu create(ResourceBundle bundle,			       String menuname, String[] itemnames,			       ActionListener listener)    {        // Get the menu title from the bundle.  Use name as default label.        String menulabel;        try { menulabel = bundle.getString(menuname + ".label"); }        catch(MissingResourceException e) { menulabel = menuname; }	        // Create the menu pane.        JMenu menu = new JMenu(menulabel); 	        // For each named item in the menu.        for(int i = 0; i < itemnames.length; i++) {            // Look up the label for the item, using name as default.            String itemlabel;            try {		itemlabel =		    bundle.getString(menuname+"."+itemnames[i]+".label");	    }            catch (MissingResourceException e) { itemlabel = itemnames[i]; }	    	    JMenuItem item = new JMenuItem(itemlabel);			            // Look up an accelerator for the menu item            try {		String acceleratorText =		    bundle.getString(menuname+"."+itemnames[i]+".accelerator");		item.setAccelerator(KeyStroke.getKeyStroke(acceleratorText));	    }            catch (MissingResourceException e) {}	                // Register an action listener and command for the item.            if (listener != null) {                item.addActionListener(listener);                item.setActionCommand(itemnames[i]);            }	                // Add the item to the menu.            menu.add(item);        }	        // Return the automatically created localized menu.        return menu;    }        /** A simple test program for the above code */    public static void main(String[] args) {	// Get the locale: default, or specified on command-line	Locale locale;	if (args.length == 2) locale = new Locale(args[0], args[1]);	else locale = Locale.getDefault();	// Get the resource bundle for that Locale.  This will throw an	// (unchecked) MissingResourceException if no bundle is found.	ResourceBundle bundle = 	    ResourceBundle.getBundle("com.davidflanagan.examples.i18n.Menus",				     locale);		// Create a simple GUI window to display the menu with        final JFrame f = new JFrame("SimpleMenu: " +   // Window title			         locale.getDisplayName(Locale.getDefault()));        JMenuBar menubar = new JMenuBar();         // Create a menubar.        f.setJMenuBar(menubar);                    // Add menubar to window	// Define an action listener for that our menu will use.	ActionListener listener = new ActionListener() {		public void actionPerformed(ActionEvent e) {		    String s = e.getActionCommand();		    Component c = f.getContentPane();		    if (s.equals("red")) c.setBackground(Color.red);		    else if (s.equals("green"))	c.setBackground(Color.green);		    else if (s.equals("blue")) c.setBackground(Color.blue);		}	    };        // Now create a menu using our convenience routine with the resource	// bundle and action listener we've created        JMenu menu = SimpleMenu.create(bundle, "colors",				       new String[] {"red", "green", "blue"},				       listener);		// Finally add the menu to the GUI, and pop it up        menubar.add(menu);           // Add the menu to the menubar        f.setSize(300, 150);         // Set the window size.	f.setVisible(true);          // Pop the window up.    }}