Bézout’s identity (GCD Calculator)

As my first complete Java project in the university, this tool can calutate the greatest common divisor together with the Bézout identity of the input.
Bézout’s identity – Let a and b be integers with greatest common divisor d. Then, there exist integers x and y such that ax + by = d. More generally, the integers of the form ax + by are exactly the multiples of d.
– Wikipedia
The motivation for creating this tool was the repetitive work that would have been needed for completing the university homework this was programmed for.