Java Tutorial/Swing Event/HyperlinkListener

HyperlinkListener Example

   <source lang="java">

import java.io.IOException; import java.net.URL; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.event.HyperlinkEvent; import javax.swing.event.HyperlinkListener; import javax.swing.text.Document; class ActivatedHyperlinkListener implements HyperlinkListener {

 JEditorPane editorPane;
 public ActivatedHyperlinkListener(JEditorPane editorPane) {
   this.editorPane = editorPane;
 }
 public void hyperlinkUpdate(HyperlinkEvent hyperlinkEvent) {
   HyperlinkEvent.EventType type = hyperlinkEvent.getEventType();
   final URL url = hyperlinkEvent.getURL();
   if (type == HyperlinkEvent.EventType.ENTERED) {
     System.out.println("URL: " + url);
   } else if (type == HyperlinkEvent.EventType.ACTIVATED) {
     System.out.println("Activated");
     Document doc = editorPane.getDocument();
     try {
       editorPane.setPage(url);
     } catch (IOException ioException) {
       System.out.println("Error following link, Invalid link");
       editorPane.setDocument(doc);
     }
   }
 }

} public class EditorPaneSample {

 public static void main(String args[]) {
   JFrame frame = new JFrame("EditorPane Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   try {
     JEditorPane editorPane = new JEditorPane("http://www.google.ru");
     editorPane.setEditable(false);
     HyperlinkListener hyperlinkListener = new ActivatedHyperlinkListener(editorPane);
     editorPane.addHyperlinkListener(hyperlinkListener);
     JScrollPane scrollPane = new JScrollPane(editorPane);
     frame.add(scrollPane);
   } catch (IOException e) {
     System.err.println("Unable to load: " + e);
   }
   frame.setSize(640, 480);
   frame.setVisible(true);
 }

}</source>

JEditorPane and HyperlinkEvent

   <source lang="java">

import java.awt.BorderLayout; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.net.URL; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JScrollPane; import javax.swing.JTextField; import javax.swing.JToolBar; import javax.swing.event.HyperlinkEvent; import javax.swing.event.HyperlinkListener; public class MainClass extends JFrame {

 protected JEditorPane mEditorPane;
 protected JTextField mURLField;
 public MainClass() {
   super();
   JToolBar urlToolBar = new JToolBar();
   mURLField = new JTextField(40);
   urlToolBar.add(new JLabel("Location:"));
   urlToolBar.add(mURLField);
   frame.add(urlToolBar, BorderLayout.NORTH);
   mEditorPane = new JEditorPane();
   mEditorPane.setEditable(false);
   frame.add(new JScrollPane(mEditorPane), BorderLayout.CENTER);
   openURL("http://www.jexp.ru");
   mURLField.addActionListener(new ActionListener() {
     public void actionPerformed(ActionEvent ae) {
       openURL(ae.getActionCommand());
     }
   });
   mEditorPane.addHyperlinkListener(new LinkActivator());
   setSize(500, 600);
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }
 protected void openURL(String urlString) {
   try {
     URL url = new URL(urlString);
     mEditorPane.setPage(url);
     mURLField.setText(url.toExternalForm());
   } catch (Exception e) {
     System.out.println("Couldn"t open " + urlString + ":" + e);
   }
 }
 class LinkActivator implements HyperlinkListener {
   public void hyperlinkUpdate(HyperlinkEvent he) {
     HyperlinkEvent.EventType type = he.getEventType();
     if (type == HyperlinkEvent.EventType.ACTIVATED)
       openURL(he.getURL().toExternalForm());
   }
 }
 public static void main(String[] args) {
   new MainClass().setVisible(true);
 }

}</source>