Can somebody explain this to me

Question

I can't understand where it got that output
https://code.sololearn.com/cSAXGeQG999n/?ref=app

Answer 1

When we directly print any object, it'll call it's toString() method.
Since you haven't defined any toString method, it'll call the toString method defined in Object class (Object class is super class of all classes). You'll understand this more clearly in Inheritance topic.
The toString method in Object class prints the hashcodes of the objects.

For more explanation: https://www.javatpoint.com/understanding-toString()-method