I am trying to make a simple chat program with the username in a certain font styles while the chat text in default. However, the results is both the username and the chat text have the same style... What did I go wrong?...

I have also tried to look at the official tutorial at this link but i doesn't seem to help much...

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        if (jTextArea2.getText().length() != 0) {
            user_ = SimpleChatLogin.getUser();
            appendUserText(user_);
            Style st = jTextPane1.addStyle("Black", null);
            StyleConstants.setForeground(style, Color.black);
            StyleConstants.setBold(style, true);
            appendChatText(jTextArea2.getText());
            jTextArea2.setText("");
        }
    } 
 
    public void appendUserText(String text) {
        try {
            StyledDocument chatName = jTextPane1.getStyledDocument();
 
            // Setting the font style
            Style style = jTextPane1.addStyle("Blue", null);
            StyleConstants.setForeground(style, Color.blue);
            StyleConstants.setBold(style, true);
 
 
            // Append to document
            chatName.insertString(chatName.getLength(), SimpleChatLogin.getUser() + " ", style);
        } catch (BadLocationException e) {
            System.out.println("Failed to append text: " + e);
        }
    }
 
     // Appends chat text to the document and ensure that it is visible
    public void appendChatText(String text) {
        try {
            Document chatText = jTextArea2.getDocument();
 
            // Move the insertion point to the end
            jTextArea2.setCaretPosition(chatText.getLength());
 
            // Insert the text
            jTextPane1.replaceSelection(text + "\n");
 
            // Convert the new end location
            // to view co-ordinates
            Rectangle r = jTextArea2.modelToView(chatText.getLength());
 
            // Finally, scroll so that the new text is visible
            if (r != null) {
                jTextPane1.scrollRectToVisible(r);
            }
        } catch (BadLocationException e) {
            System.out.println("Failed to append text: " + e);
        }
    }