Java Tutorial/Swing Event/HyperlinkListener

HyperlinkListener Example

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);
  }
}

JEditorPane and HyperlinkEvent

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);
  }
}