Question

I want to know whether we can set two highlighters to a JEditorpane using sethighlighter(new Highlighter()) method where one is a default highlighter and the other is a underline highlighter.

Answer 1

You can use one highlighter but adding highlights with another HighlightPainter to paint your underline.

public Object addHighlight(int p0, int p1, HighlightPainter p) throws BadLocationException;