Initialization blocks order in Java. Especially useful for anonymous classes in order to mimic constructor behavior

initializer_blocks_order.java

package pl.jellysoft;

public class Main {

    public static void main(String[] args) {

        // Create anonymous class
        new Child() {

            /* THIS WON'T COMPILE
            static{
                System.out.println("Static initializer block within Example");
            }
            */

            {
                System.out.println("Initializer block within Anonymous class");
                childMethod();
                parentMethod();
            }

            private void newMethod() {
                System.out.println("Method from anonymous class invoked");
            }

        }.newMethod();

    }

    private static class Child extends Parent {

        static {
            System.out.println("Static initializer block within Child class");
        }

        {
            System.out.println("Initializer block within Child class");
        }

        Child() {
            System.out.println("Inside Child class constructor");
        }

        void childMethod() {
            System.out.println("Child method invoked");
        }

    }

    private static class Parent {

        static {
            System.out.println("Static initializer block within Parent class");
        }

        {
            System.out.println("Initializer block within Parent class");
        }

        Parent() {
            System.out.println("Inside Parent class constructor");
        }

        void parentMethod() {
            System.out.println("Parent method invoked");
        }

    }
}