Why output is "x"?

Question

Hello, guys!
This is code from challenge.
So, who can explain me, why in output "x"?
What a java magic?:)
I mean, we don't call method toString(), but just make new object?
https://code.sololearn.com/c66M60VQ4wCu/?ref=app

Answer 1

https://stackoverflow.com/questions/20735132/what-happens-when-printing-an-object-in-java

Answer 2

When printing out an object, the compiler calls the toString() method

Answer 3

Really? It's mean that "toString" default getter, hm.
thank you!