Java By Comparison

Favor Format Over Concatenation

class Mission {

    Logbook logbook;
    LocalDate start;

    void update(String author, String message) {
        LocalDate today = LocalDate.now();
        String month = String.valueOf(today.getMonthValue());
        String formattedMonth = month.length() < 2 ? "0" + month : month;
        String entry = author.toUpperCase() + ": [" + formattedMonth + "-" +
                today.getDayOfMonth() + "-" + today.getYear() + "](Day " +
                (ChronoUnit.DAYS.between(start, today) + 1) + ")> " +
                message + System.lineSeparator();
        logbook.write(entry);
    }
}

Understandability and readability don’t just matter in your code—they’re also important for the output your code produces.

If you have to build large strings, you can use format strings ...