I need an explanation for code below

Question

How is code compiled in this way,and why.Can someone explain it pls
how is the output :s1s2main

public class Program
{

static{

System.out.println ("s1");
}

public static void main(String[] args) {

System.out.println ("main");

}

static{

System.out.println ("s2");
}

}

Answer 1

Samir Krasnic

static {

}

This is known as static block which execute before the main method.

So s1s2main

Answer 2

static {} blocks are part of class and they executed by class initialisation - before main() in order how they are present in source code. it is useful for fields initiaize.

block can be also non-static and then it is executed by object creation