Apply change of style on DefaultStyledDocument

Question

Hi All,
I have problem with DefaultStyledDocument. I want change attribute of some style and apply changes on text, that was written by this style. I can get style by the metod getStyle(String name) and change attribute by the metod StyleConstants.setForeground(style, color). May somebody tell me, how I must apply change on document? Thanks.

Answer 1

camickr wrote:
If you change the attributes of an existing Style then you should just repaint() the text pane.
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting], so the posted code retains its original formatting.
Thanks for your reaction. I am sorry, ok here is some example:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import java.awt.GridBagLayout;
import java.util.Enumeration;
import javax.swing.JButton;
public class TestStyle extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JScrollPane jScrollPane = null;
     private JTextPane jTextPane = null;
     private Style attrs[] = new Style[2]; //  @jve:decl-index=0:
     private DefaultStyledDocument doc;
     private JPanel jPanel = null;
     private JButton jButton = null;
     public TestStyle() {
          super();
          initialize();
     private void initialize() {
          this.setSize(300, 200);
          this.setContentPane(getJContentPane());
          this.setTitle("JFrame");
          this.setVisible(true);
          this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     private JPanel getJContentPane() {
          if (jContentPane == null) {
               jContentPane = new JPanel();
               jContentPane.setLayout(new BorderLayout());
               jContentPane.add(getJScrollPane(), BorderLayout.CENTER);
               jContentPane.add(getJPanel(), BorderLayout.NORTH);
          return jContentPane;
     private JScrollPane getJScrollPane() {
          if (jScrollPane == null) {
               jScrollPane = new JScrollPane();
               jScrollPane.setViewportView(getJTextPane());
          return jScrollPane;
     private JPanel getJPanel() {
          if (jPanel == null) {
               jPanel = new JPanel();
               jPanel.setLayout(new FlowLayout());
               jPanel.add(getJButton(), null);
          return jPanel;
     private JTextPane getJTextPane() {
          if (jTextPane == null) {
               jTextPane = new JTextPane();
               String text = "This is some text witch will be changed.\n"
                         + "And next line...";
               int len = text.length();
               doc = (DefaultStyledDocument) jTextPane.getStyledDocument();
               Style def = StyleContext.getDefaultStyleContext().getStyle(
                         StyleContext.DEFAULT_STYLE);
               attrs[0] = doc.addStyle("one", def);
               attrs[1] = doc.addStyle("two", def);
               StyleConstants.setForeground(attrs[1], Color.red);
               doc.addStyle("one", attrs[0]);
               StyleConstants.setForeground(attrs[0], Color.blue);
               doc.addStyle("two", attrs[1]);
               try {
                    doc.insertString(0, text, attrs[0]);
                    doc.insertString(len, "This is default style. ", null);
                    doc.insertString(doc.getLength(), "And this is red style.",
                              attrs[1]);
               } catch (BadLocationException e) {
                    e.printStackTrace();
          return jTextPane;
     private JButton getJButton() {
          if (jButton == null) {
               jButton = new JButton("Change");
               //change attribute (don't work)
               jButton.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
                         Style s = doc.getStyle("one");
                         System.out.println(s);
                         StyleConstants.setForeground(s, Color.green);
                         SwingUtilities.invokeLater(new Runnable() {
                              public void run() {
                                   jTextPane.repaint();
          return jButton;
     public static void main(String[] arg) {
          new TestStyle();
}If I press the Change button blue text should change its color on green, but it isn't work.