import javax.swing.*; import javax.swing.text.*; import javax.swing.text.html.*; import javax.swing.text.html.parser.*; import javax.swing.text.html.HTMLEditorKit.*; import java.awt.*; import java.awt.event.*; import java.io.*; public class HtmlDemo extends JPanel { JEditorPane thePane; JTextArea htmlTextArea; StringReader aReader; MyCallback cb; ParserDelegator aParser; public HtmlDemo() { super(); String initialText = "\n" + "\n" + "Color and font test:\n" + "

red\n" + "
blue\n" + "
green\n" + "
small\n" + "
large\n" + "
italic\n" + "
bold\n" + "

\n" + "\n" + "\n"; htmlTextArea = new JTextArea(10, 20); htmlTextArea.setText(initialText); JScrollPane scrollPane = new JScrollPane(htmlTextArea); JButton changeTheLabel = new JButton("Change the content"); changeTheLabel.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { thePane.setText(htmlTextArea.getText()); try { aParser.parse(aReader, cb, false); } catch (Exception ep) { System.err.println("Could not parse again"); } } }); changeTheLabel.setAlignmentX(Component.CENTER_ALIGNMENT); aReader = new StringReader(initialText); cb = new MyCallback(); aParser = new ParserDelegator(); try { aParser.parse(aReader, cb, false); } catch (Exception e) { System.err.println("Couldn't parse"); } try { thePane = new JEditorPane("text/html", initialText); } catch (Exception e) { System.err.println("Couldn't create editor pane"); } thePane.setEditable(false); JScrollPane theScrollPane = new JScrollPane(thePane); theScrollPane.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); theScrollPane.setPreferredSize(new Dimension(200, 200)); JPanel leftPanel = new JPanel(); leftPanel.setLayout(new BoxLayout(leftPanel, BoxLayout.Y_AXIS)); leftPanel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder( "Edit the HTML, then click the button"), BorderFactory.createEmptyBorder(10,10,10,10))); leftPanel.add(scrollPane); leftPanel.add(Box.createVerticalStrut(10)); leftPanel.add(changeTheLabel); JPanel rightPanel = new JPanel(); rightPanel.setLayout(new BoxLayout(rightPanel, BoxLayout.Y_AXIS)); rightPanel.setBorder(BorderFactory.createCompoundBorder( BorderFactory.createTitledBorder("A label with HTML"), BorderFactory.createEmptyBorder(10,10,10,10))); rightPanel.add(theScrollPane); setLayout(new BoxLayout(this, BoxLayout.X_AXIS)); setBorder(BorderFactory.createEmptyBorder(10,10,10,10)); add(leftPanel); add(Box.createHorizontalStrut(10)); add(rightPanel); } public static void main(String args[]) { JFrame f = new JFrame("HtmlDemo"); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); f.getContentPane().add(new HtmlDemo()); f.pack(); f.setVisible(true); } } class MyCallback extends HTMLEditorKit.ParserCallback { public void handleStartTag(HTML.Tag tag, MutableAttributeSet attribs, int pos) { String fontcolor = ""; if (tag.equals(HTML.Tag.FONT)) { fontcolor=(String)attribs.getAttribute(HTML.Attribute.COLOR); if (fontcolor == null) { return; } System.out.println("A font color is " + fontcolor +"(" + pos + ")"); } } }