Code blocks - what are they and why are they executed without an explicit command?

Question

Java

Good afternoon.



I create a class, in it I open a code block static \ non-static.
When an object is created, these blocks are executed, although I did not put them in the constructor and did not execute the methods.

The question is - what is an unmarked block of code (not a method, not a parameter...) and why is it executed without an explicit command?

I want to deal with this issue, what to google?

Answer 1

It's not just blocks of code. These are static/non-static initialization blocks. Accordingly, static initialization is performed once at the first call to the class, non-static - each time the class object is created.