Dump KeyEvents from a JTextPane

EventDump.java

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

class EventDump extends KeyAdapter {

    public static void main(String[] args) {
        new EventDump();
    }

    Document doc;

    EventDump() {
        JFrame frm = new JFrame("Event dump");
        JTextPane edit = new JTextPane();
        edit.setText("Type here\n");
        edit.setCaretPosition(edit.getText().length());
        edit.setPreferredSize(new Dimension(600, 400));
        edit.addKeyListener(this);
        JTextArea log = new JTextArea(15, 20);
        log.setEditable(false);
        //log.setPreferredSize(new Dimension(600, 200));
        try {
            log.setFont(new Font("Monospaced", 0, 12));
        } catch (Exception e) {
        }
        doc = log.getDocument();
        JScrollPane scroll = new JScrollPane(log);
        frm.getContentPane().add(BorderLayout.CENTER, edit);
        frm.getContentPane().add(BorderLayout.SOUTH, scroll);
        frm.pack();
        frm.setLocationByPlatform(true);
        frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frm.setVisible(true);
    }

    @Override public void keyTyped(KeyEvent e) {
        String str = fmt("typed", e);
        try {
            doc.insertString(doc.getLength(), str, null);
        } catch (BadLocationException err) {
            err.printStackTrace();
        }
    }

    @Override public void keyPressed(KeyEvent e) {
        String str = fmt("pressed", e);
        try {
            doc.insertString(doc.getLength(), str, null);
        } catch (BadLocationException err) {
            err.printStackTrace();
        }
    }

    @Override public void keyReleased(KeyEvent e) {
        String str = fmt("released", e);
        try {
            doc.insertString(doc.getLength(), str, null);
        } catch (BadLocationException err) {
            err.printStackTrace();
        }
    }

    private String fmt(String name, KeyEvent e) {
        int chr = e.getKeyChar();
        if (e.getKeyCode() == 0 && e.getExtendedKeyCode() == 0)
            return String.format("%8s char=0x%04x\n", name, chr);
        if (e.getKeyCode() == 0)
            return String.format
                ("%8s char=0x%04x code=0        extended=0x%04x\n",
                 name, chr,
                 e.getExtendedKeyCode());
        return String.format
            ("%8s char=0x%04x code=0x%04x=%s extended=0x%04x\n",
             name, chr,
             e.getKeyCode(),
             KeyEvent.getKeyText(e.getKeyCode()),
             e.getExtendedKeyCode());
    }
    
}