Order of Invokation of initializer blocks and constructor

1. Parent static block
2. Child static block
3. Parent initialization block
4. Parent Constructor
5. Child initialization block
6. Child Constructor

👆🏽 output of the code below

public class Parent {    
    public Parent() {
        System.out.println("Parent Constructor");
    }    
    static {
        System.out.println("Parent static block");    
    }    
    {
        System.out.println("Parent initialisation  block");
    }
}

public class Child extends Parent {    
    {
        System.out.println("Child initialisation block");
    }
    static {
        System.out.println("Child static block");
    }

    public Child() {
        System.out.println("Child Constructor");
    }    
    public static void main(String[] args) {
        new Child();    
    }
}

Initialization blocks get invoked in the order they're written in the code.

References

• In what order do static blocks and initialization blocks execute when using inheritance? - Stack Overflow
• Order of execution of Initialization blocks and Constructors in Java

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Backlinks

• Instance Initializer Block (cs)
• Static Blocks (cs)