Thread to call some methods

Question

I have some methods that when my program starts
They call and process data.
getpeymentdata();
filltable();
getmycards();
How should use thread for this methods?
And how thread help process ?

Answer 1

it is useful if yo need do two or more things in same time. eg to processes data in background.
https://docs.oracle.com/javase/tutorial/essential/concurrency/runthread.html