[hardwired]

This seems to work okay.

Code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;

public class StyleIntegrity {
    JTextPane textPane;

    public StyleIntegrity() {
        System.setProperty("swing.aatext", "true");
        String text = "This component models paragraphs that are composed of " +
            "runs of character level attributes. Each paragraph may have a " +
            "logical style attached to it which contains the default attributes " +
            "to use if not overridden by attributes set on the paragraph or " +
            "character run.";
        textPane = new JTextPane();
        StyledDocument doc = textPane.getStyledDocument();
        createStyles(doc);
        setContent(doc, text);
        styleContent(doc);
    }

    private void createStyles(StyledDocument doc) {
        Style baseStyle = doc.addStyle("base", null);
        StyleConstants.setFontFamily(baseStyle, "Lucida Sans Unicode");
        StyleConstants.setFontSize(baseStyle, 18);
        StyleConstants.setFirstLineIndent(baseStyle, 20f);
        StyleConstants.setLeftIndent(baseStyle, 10f);

        Style style = doc.addStyle("red", baseStyle);
        StyleConstants.setForeground(style, Color.red);
    }

    private void setContent(StyledDocument doc, String text) {
        try {
            doc.insertString(0, text, doc.getStyle("base"));
        } catch(BadLocationException e) {
            System.out.printf("Bad location error: %s%n", e.getMessage());
        }
    }

    private void styleContent(StyledDocument doc) {
        Style style = doc.getStyle("base");
        doc.setLogicalStyle(0, style);
        style = doc.getStyle("red");
        doc.setCharacterAttributes(116, 66, style, false);
    }

    private JMenuBar getMenuBar() {
        JMenu edit = new JMenu("Edit");
        edit.add(new DefaultEditorKit.CutAction());
        edit.add(new DefaultEditorKit.CopyAction());
        edit.add(new DefaultEditorKit.PasteAction());
        edit.getItem(0).setText("cut");
        edit.getItem(1).setText("copy");
        edit.getItem(2).setText("paste");
        JMenuBar menuBar = new JMenuBar();
        menuBar.add(edit);
        return menuBar;
    }

    private JScrollPane getContent() {
        return new JScrollPane(textPane);
    }

    public static void main(String[] args) {
        StyleIntegrity test = new StyleIntegrity();
        JFrame f = new JFrame();
        f.setJMenuBar(test.getMenuBar());
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(test.getContent());
        f.setSize(500,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}