How to add text different color on JTextPane

This will print out "BLAH BLEG" in two different colors.

public class Main {
    public static void main(String[] args) {
        JTextPane textPane = new JTextPane();
        StyledDocument doc = textPane.getStyledDocument();

        Style style = textPane.addStyle("I'm a Style", null);
        StyleConstants.setForeground(style, Color.red);

        try { doc.insertString(doc.getLength(), "BLAH ",style); }
        catch (BadLocationException e){}

        StyleConstants.setForeground(style, Color.blue);

        try { doc.insertString(doc.getLength(), "BLEH",style); }
        catch (BadLocationException e){}

        JFrame frame = new JFrame("Test");
        frame.getContentPane().add(textPane);
        frame.pack();
        frame.setVisible(true);
    }
}

Look here: Style Tutorial

and check the section labeled: An Example of Using a Text Pane for a great example of how to dynamically change the colors.

for JTextPane you can implements StyledDocument some examples for that on http://www.java2s.com/Code/Java/Swing-JFC/TextPane.htm