Lesson 8 - Birthday Reminder in Java Swing - Finishing the Application

In the previous lesson, Birthday Reminder in Java Swing - Completing the logic, we finished the logic layer of a friends' birthday reminder application. In today's lesson, we'll wire new methods to the form and complete the application.

Nearest Birthday

We'll add an auxiliary private method refreshNearest() to the main form class to refresh the label with the nearest birthday:

private void refreshNearest() {
    if (!personManager.getPersons().isEmpty()) {
        Person nearest = personManager.findNearest();
        int age = nearest.calculateAge();
        LocalDate today = LocalDate.now();
        if (today.getDayOfMonth() != nearest.getBirthday().getDayOfMonth()
            || today.getMonth() != nearest.getBirthday().getMonth()
            || today.getYear() != nearest.getBirthday().getYear()) {
            age++;
        }
        nearestJLabel.setText(nearest.getName() + " (" + age + " years old) in " + nearest.getDaysRemaining() + " days");
    } else {
        nearestJLabel.setText("There are no persons in the list.");
    }
}

If there are any persons in the person manager, we'll find

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