@SuppressWarnings("serial")
public class ColorPane extends JTextPane {
public void append(Color c, String s) {
StyleContext sc = StyleContext.getDefaultStyleContext();
AttributeSet aset = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, c);
int len = getDocument().getLength(); // same value as getText().length();
setCaretPosition(len); // place caret at the end (with no selection)
setCharacterAttributes(aset, false);
replaceSelection(s); // there is no selection, so inserts at caret