hyperlinkdemo.java

《java事件处理指南》一书的代码,好东西

import javax.swing.*;
import javax.swing.event.*;
import java.io.*;

public class HyperlinkDemo extends JFrame implements HyperlinkListener
{
   private JEditorPane jep = null;

   public HyperlinkDemo() 
   {
/*  A JEditorPane object is initialized with an HTML file.    */
/*  The JEditorPane registers a HyperlinkListener             */
/*  and is added to the content pane of a JFrame.             */

/*  NOTE:  you will have to change the html file location     */
/*  to whatever it should be on your system.                  */

      try
      {
         jep = new JEditorPane(
 "file:/usr/people/palmer/Java_Event/CD_examples/TheBoys.html");
         jep.setContentType("text/html");
         jep.setEditable(false);
      }
      catch (IOException ioe)
      {
         ioe.printStackTrace(System.err);
         System.exit(1);
      }

      jep.addHyperlinkListener(this);

      getContentPane().add(new JScrollPane(jep));

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setBounds(100, 100, 400, 400);
      setVisible(true);
   }

/*  When the user clicks on a hyperlink in one of the HTML pages,    */
/*  a HyperlinkEvent is generated and sent to the hyperlinkUpdate()  */
/*  method.  The event is used to obtain the URL associated with     */
/*  the hyperlink and the HTML page displayed by the JEditorPane     */
/*  is changed to be the one represented by the hyperlink.           */

   public void hyperlinkUpdate(HyperlinkEvent event)
   {
      try
      {
         if ( event.getEventType() == HyperlinkEvent.EventType.ACTIVATED )
         {
           jep.setPage(event.getURL());
         }
      }
      catch (IOException ioe)
      {
         ioe.printStackTrace(System.err);
      }
   }

   public static void main(String args[]) 
   {
      HyperlinkDemo demo = new HyperlinkDemo();
   }
}