import javax.swing.*;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.beans.VetoableChangeListener;

public class AppTest extends JFrame {
    
    public AppTest() {
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        
        getContentPane().setLayout(new BorderLayout());

        final JTextPane comp = new JTextPane();
        final StyledDocument doc = comp.getStyledDocument();


        Style style = comp.addStyle("superscript", null);
        StyleConstants.setSuperscript(style, true);
        StyleConstants.setBackground(style, Color.YELLOW);
        try { doc.insertString(doc.getLength(), "hello", style); } catch(Exception e) {}

        Style style3 = comp.addStyle("subscript", null);
        StyleConstants.setBackground(style3, Color.YELLOW);
        StyleConstants.setSubscript(style3, true);
        try { doc.insertString(doc.getLength(), "goodbye", style3); } catch(Exception e) {}

        Style style4 = comp.addStyle("normal", null);
        StyleConstants.setBackground(style4, Color.YELLOW);
        try { doc.insertString(doc.getLength(), "world", style4); } catch(Exception e) {}

        comp.setDocument(doc);

		getContentPane().add(comp, BorderLayout.CENTER);
    }
        
	public static void main(String[] args) throws Exception {
		JFrame frame = new AppTest();
        frame.setSize(600,600);
		frame.setVisible(true);
	}
}