Recipe 15.11 Program: MenuIntl

MenuIntl (shown in Example 15-1) is a complete version of the menu code presented in Recipe Recipe 15.3.

Example 15-1. MenuIntl.java

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; /** This is a partly-internationalized version of MenuDemo.  * To try it out, use  *        java MenuIntl  *        java -Duser.language=es MenuIntl  */ public class MenuIntl extends JFrame {     /** "main program" method - construct and show */     public static void main(String[] av) {         // create an MenuIntl object, tell it to show up         new MenuIntl( ).setVisible(true);     }     /** Construct the object including its GUI */     public MenuIntl( ) {         super("MenuIntlTest");         JMenuItem mi;        // used in various spots         Container cp = getContentPane( );         cp.setLayout(new FlowLayout( ));         JLabel lab;         cp.add(lab = new JLabel( ));         addWindowListener(new WindowAdapter( ) {             public void windowClosing(WindowEvent e) {                 setVisible(false);                 dispose( );                 System.exit(0);             }         });         JMenuBar mb = new JMenuBar( );         setJMenuBar(mb);         ResourceBundle b = ResourceBundle.getBundle("Menus");         String titlebar;         try { titlebar = b.getString("program"+".title"); }         catch (MissingResourceException e) { titlebar="MenuIntl Demo"; }         setTitle(titlebar);         String message;         try { message = b.getString("program"+".message"); }         catch (MissingResourceException e) {              message="Welcome to the world of Java";         }         lab.setText(message);         JMenu fm = mkMenu(b, "file");         fm.add(mi = mkMenuItem(b, "file", "open"));         // In finished code there would be a call to         // mi.addActionListener(...) after *each* of          // these mkMenuItem calls!         fm.add(mi = mkMenuItem(b, "file", "new"));         fm.add(mi = mkMenuItem(b, "file", "save"));         fm.add(mi = mkMenuItem(b, "file", "exit"));         mi.addActionListener(new ActionListener( ) {             public void actionPerformed(ActionEvent e) {                 MenuIntl.this.setVisible(false);                 MenuIntl.this.dispose( );                 System.exit(0);             }         });         mb.add(fm);         JMenu vm = mkMenu(b,  "view");         vm.add(mi = mkMenuItem(b, "view", "tree"));         vm.add(mi = mkMenuItem(b, "view", "list"));         vm.add(mi = mkMenuItem(b, "view", "longlist"));         mb.add(vm);         JMenu hm = mkMenu(b,  "help");         hm.add(mi = mkMenuItem(b, "help", "about"));         // mb.setHelpMenu(hm);    // needed for portability (Motif, etc.).         // the main window         JLabel jl = new JLabel("Menu Demo Window");         jl.setSize(200, 150);         cp.add(jl);         pack( );     }     /** Convenience routine to make a JMenu */     public JMenu mkMenu(ResourceBundle b, String name) {         String menuLabel;         try { menuLabel = b.getString(name+".label"); }         catch (MissingResourceException e) { menuLabel=name; }         return new JMenu(menuLabel);     }     /** Convenience routine to make a JMenuItem */     public JMenuItem mkMenuItem(ResourceBundle b, String menu, String name) {         String miLabel;         try { miLabel = b.getString(menu + "." + name + ".label"); }         catch (MissingResourceException e) { miLabel=name; }         String key = null;         try { key = b.getString(menu + "." + name + ".key"); }         catch (MissingResourceException e) { key=null; }         if (key == null)             return new JMenuItem(miLabel);         else             return new JMenuItem(miLabel, key.charAt(0));     } }