static block vs initializer block vs constructor in inheritance

Question

i find this example and i want to understand the logic behind it ? how constructors and static blocks and initializer blocks works in inheritance ? in which stage each one is called ?

public class Parent {

    static {
        System.out.println("i am Parent 3");
    }

    {
        System.out.println("i am parent 2");
    }

    public Parent() {
        System.out.println("i am parent 1");
    }

}

public class Son extends Parent {

    static {System.out.println("i am son 3");}
    {System.out.println("i am son 2");}

    public Son() {
        System.out.println("i am son 1");
    }

    public static void main(String[] args) {
        new Son();
    }
}

the output is :

i am Parent 3
i am son 3
i am parent 2
i am parent 1
i am son 2
i am son 1

Answer 1

A static block is called once, when the class is loaded and initialized by the JVM. An instance initializer is executed when an instance of the class is constructed, just like a constructor.

Static and Instance initializers are described in the Java Language Specification