Bubble sort in java

Question

I have taken the following code from a book.In the book it is written that the following example is based on bubble sort but I think it is based on some other sorting method.Please help.
https://code.sololearn.com/cdgpf3v91NuE/?ref=app

Answer 1

I know about bubble sort,I want to know that in my example which type of sorting had been used?