HyperlinkListener Example : HTML Document « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. HTML Document

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.com");
      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);
  }
}

14.37.HTML Document
	14.37.1.	HTML Tag Constants
	14.37.2.	Iterating Across HTML Documents for Links
	14.37.3.	Look for specific tag types, such as HTML.Tag.H1, HTML.Tag.H2
	14.37.4.	ElementIterator Class
	14.37.5.	Finding out interested element
	14.37.6.	HyperlinkListener Example