import java.awt.BorderLayout;
import java.io.FileInputStream;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.text.rtf.RTFEditorKit;
public class Main extends JFrame {
public Main() throws Exception{
setSize(400, 240);
JPanel topPanel = new JPanel();
topPanel.setLayout(new BorderLayout());
getContentPane().add(topPanel, BorderLayout.CENTER);
RTFEditorKit rtf = new RTFEditorKit();
JEditorPane editor = new JEditorPane();
editor.setEditorKit(rtf);
JScrollPane scroller = new JScrollPane();
scroller.getViewport().add(editor);
topPanel.add(scroller, BorderLayout.CENTER);
FileInputStream fi = new FileInputStream("test.rtf");
rtf.read(fi, editor.getDocument(), 0);
}
public static void main(String args[]) throws Exception{
Main mainFrame = new Main();
mainFrame.setVisible(true);
}
}