Inserting Styled Text in a Text Pane
See the StyleConstants class for more attributes. 

 
 try {
     JTextPane textPane = new JTextPane();
     StyledDocument doc =
       (StyledDocument)textPane.getDocument();
     Style style = doc.addStyle("StyleName", null);
     
     // Italic
     StyleConstants.setItalic(style, true);
     
     // Bold
     StyleConstants.setBold(style, true);
     
     // Font Family
     StyleConstants.setFontFamily(style, "SansSerif");
     
     // Font Size
     StyleConstants.setFontSize(style, 30);
     
     // Background Color
     StyleConstants.setBackground(style, Color.blue);
     
     // Foreground Color
     StyleConstants.setForeground(style, Color.white);
     
     // Append to document.
     doc.insertString(doc.getLength(),
       "Some Text", style);
  } catch (BadLocationException e) {
 }