What is java.lang.StackOverFlow error?

Question

I tried to prepare a program using Threads but unfortunately it crashes with the StackOverFlow error.I can't understand that how can I resolve this error.
Please help me so that I can complete my program.
The code is below:-
https://code.sololearn.com/c0j3SWnXKlnc/?ref=app

Answer 1

You are creating a new instance of a customer class from the sl class, and then creating a new instance of the sl class in that customer class. This is recursive, and a recursive function with no base case results in a stack overflow exception. You should only instantiate one of each class as public, then reference them to each other.

Answer 2

Thanks for the suggestion.
You mean that I have to create a different public class that will run all the methods and initiate all the classes.

Answer 3

That's not exactly what I meant. I suggest doing something like public sl sl1 = new sl(), then referencing only to sl1 throughout the entire program, and not using any new instances of that class anymore.

Answer 4

OK Thank You very much.