Calling constructor of interface?

Question

Below is the code, I need to know why the code don't give error on line 7 when we are calling an interface's constructor in the constructor of a class which is implementing that interface.
https://code.sololearn.com/ce4ek30IQm90/?ref=app

Answer 1

Here, read this:

https://stackoverflow.com/questions/31019157/how-do-all-classes-inherit-from-object

I'm really bad explaining

Answer 2

Can you explain what does line 7 exactly doing?

Answer 3

neo.h thnx now I understood it.

Answer 4

neo.h I couldn't understand what do you mean by Object class's constructor? Can you elaborate more?

Answer 5

You're not actually calling the interface's constructor.
See, all classes in java inherit from the Object class, so you're calling the Object class' constructor