HelpMenu.java

import java.net.*;
import javax.help.*;
import javax.swing.*;
import java.awt.event.*;

public class HelpMenu {
   JFrame f;
   JMenuItem topics;

   public HelpMenu() {
     f = new JFrame("Menu Example");
     JMenuBar mbar = new JMenuBar();
     
     // a file menu
     JMenu file = new JMenu("File");
     JMenu help = new JMenu("Help");

     // add an item to the help menu
     help.add(topics = new JMenuItem("Help Topics"));

     // add the menu items to the menu bar
     mbar.add(file);
     mbar.add(help);

     // 1. create HelpSet and HelpBroker objects
     HelpSet hs = getHelpSet("javahelp/road.hs"); 
     HelpBroker hb = hs.createHelpBroker();

     // 2. assign help to components
     //CSH.setHelpIDString(topics, "top");
     
     // 3. handle events
     topics.addActionListener(new CSH.DisplayHelpFromSource(hb));

     // attach menubar to frame, set its size, and make it visible
     f.setJMenuBar(mbar);
     f.setSize(500, 300);
     f.setVisible(true);
   }

   /**
    * find the helpset file and create a HelpSet object
    */
   public HelpSet getHelpSet(String helpsetfile) {
      HelpSet hs = null;
      ClassLoader cl = this.getClass().getClassLoader();
      try {
        URL hsURL = HelpSet.findHelpSet(cl, helpsetfile);
        hs = new HelpSet(null, hsURL);
      } catch(Exception ee) {
        System.out.println("HelpSet: "+ee.getMessage());
        System.out.println("HelpSet: "+ helpsetfile + " not found");
      }
      return hs;
   }

   public static void main(String argv[]) {
      new HelpMenu();
   }
}