how to work with MutableAttributeSet or SimpleAttributeSet

[unhurt]

hi, im new to this forums, can i say hi here?

what im trying to figure out is how do i work with those 2(or 3 if counted StyledEditorKit)

im trying to do a simple typing program, after my char on my JTextPane matches my input from my KeyEvent, the colour will change to my preset colour(mark as correct) i can't figure out how do i use mutable or simple, i know how to go around with highlighting the next character with the caret by using forwardAction but i just don't know how to change the colour from black to anything

i appreciate it if you could show some codes depicting when my char is selected and how the method is call or used to change the colour, thank you in advance

[hardwired]

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

public class TextPaneExample implements ActionListener {
    JTextPane textPane;
    Style[] styles;

    public void actionPerformed(ActionEvent e) {
        int start = textPane.getSelectionStart();
        int end = textPane.getSelectionEnd();
        if(start != -1 && end != -1 && start != end) {
            int index = Integer.parseInt(e.getActionCommand());
            StyledDocument doc = textPane.getStyledDocument();
            int length = end - start;
            doc.setCharacterAttributes(start, length, styles[index], false);
        }
    }

    private JScrollPane getTextComponent() {
        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. Components and images may be " +
            "embedded in the flow of text.";
        textPane = new JTextPane();
        StyledDocument doc = textPane.getStyledDocument();
        Style logicalStyle = doc.addStyle("base", null);
        StyleConstants.setFontFamily(logicalStyle, "Lucida Sans Unicode");
        StyleConstants.setFontSize(logicalStyle, 20);
        StyleConstants.setLineSpacing(logicalStyle, 0.125f);
        doc.setLogicalStyle(0, logicalStyle);
        try {
            doc.insertString(0, text, logicalStyle);
        } catch(BadLocationException e) {
            System.out.println("BadLocation: " + e.getMessage());
        }
        return new JScrollPane(textPane);
    }

    private Box getButtonBox() {
        Color[] colors = {
            Color.red, Color.green, Color.pink, Color.orange
        };
        createStyles(colors);
        Dimension d = new Dimension(75, 25);
        Box box = Box.createHorizontalBox();
        box.setBorder(BorderFactory.createTitledBorder("set " +
                            "background for selected text"));
        box.add(Box.createHorizontalGlue());
        for(int j = 0; j < colors.length; j++) {
            JButton button = new JButton();
            button.setActionCommand(String.valueOf(j));
            button.setPreferredSize(d);
            button.setMinimumSize(d);
            button.setMaximumSize(d);
            button.setBackground(colors[j]);
            button.addActionListener(this);
            box.add(button);
            box.add(Box.createHorizontalGlue());
        }
        return box;
    }

    private void createStyles(Color[] colors) {
        styles = new Style[colors.length];
        StyledDocument doc = textPane.getStyledDocument();
        for(int j = 0; j < styles.length; j++) {
            String name = "color " + j;
            styles[j] = doc.addStyle(name, null);
            StyleConstants.setBackground(styles[j], colors[j]);
        }
    }

    public static void main(String[] args) {
        TextPaneExample example = new TextPaneExample();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(example.getTextComponent());
        f.getContentPane().add(example.getButtonBox(), "Last");
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}

[unhurt]

hey thanks hardwired, for providing the codes, the createStyles is the method that i want, which kinda shock me that it was so easy, as on the web i seen they all used mutable and simple and hash map