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Lesson 7 - Birthday Reminder in Java Swing - Completing the logic

In the previous lesson, Birthday Reminder in Java Swing - Wiring the layers, we merged the logic layer with the form and got the core of our friends' birthdays management application working. In today's Java Swing tutorial, we'll extend the logic layer with other methods.


We'll add the following methods to the Person class.


The method calculates and returns the current age of a person as whole years. Unfortunately, this calculation isn't just about subtracting two dates, as Java can't do it using basic libraries. Therefore, we have to make the age calculation as follows:


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Article description

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In this Java tutorial, we'll program methods to determine the person's age from their birthdate and other logic such as saving/loading people to a file.

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Article has been written for you by David Capka Hartinger
The author is a programmer, who likes web technologies and being the lead/chief article writer at He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.