code: package nanoj.srrf.java.gui;
  
  import ij.plugin.PlugIn;
  
  /**
   * Created with IntelliJ IDEA.
   * User: Ricardo Henriques <paxcalpt@gmail.com>
   * Date: 21/09/15
   * Time: 15:24
   */
  public class Help_ implements PlugIn {
  
      @Override
      public void run(String s) {
          try {
              //Set your page url in this string. For eg, I m using URL for Google Search engine
              String url = "https://bitbucket.org/rhenriqueslab/nanoj-srrf/wiki/Home";
              java.awt.Desktop.getDesktop().browse(java.net.URI.create(url));
          }
          catch (java.io.IOException e) {
              System.out.println(e.getMessage());
          }
      }
  }
  