Charset in JTextPane which using AdvancedRTFEditorKit

Question

I'm having some problems with charset encodings. I'm using AdvancedRTFEditorKit (free closed source library: http://java-sl.com/advanced_rtf_editor_kit.html).

If I copy some special characters (ěščřžýáíé) from MS Word and paste them into sample delivered with AdvancedRtfEditorKit library, everything works fine. But if I do the same with my really simple SSCCE which uses AdvancedRTFEditorKit, then they appear as just rectangles. Do you know what I'm doing wrong?

This problem only occurs with MS Office products. LibreOffice works fine.

My SSCCE:

public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setSize(350, 300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextPane pane = new JTextPane();
    pane.setEditorKit(new AdvancedRTFEditorKit());

    frame.add(pane);
    frame.setVisible(true);
}

Answer 1

After many changes in my code I figured out there isn't any problem with my app. My problem was just running app directly from NetBeans IDE. I don't know why, but IDE somehow encode/decode interaction with OS.