Good use of static, constructor and init blocks

class Bird {
{
System.out.print("b1 ");
}

public Bird() {
System.out.print("b2 ");
}
}

class Raptor extends Bird {
static {
System.out.print("r1 ");
}

public Raptor() {
System.out.print("r2 ");
}

{
System.out.print("r3 ");
}
static {
System.out.print("r4 ");
}
}

class Hawk extends Raptor {
public static void main(String[] args) {
System.out.print("pre ");
new Hawk();

System.out.println("hawk ");
/*Raptor rap = new Raptor();
if (rap instanceof Raptor){
System.out.println("i m working");
}*/
}
}


Guess what is the answer: r1 r4 pre b1 b2 r3 r2 hawk
static always related with class not with instance so they run when the class initialized, next turn for constructor but here we have init blocks so first the init blocks have run then the constructor come in picture from top to bottom, super class init => constructor => child class init => constructor...

Java Static Function

Q. Can we override the Static function in Java ?
A. Yes we can override the Static function in Java see the sample recipe

class Sample implements Over {

public static int simple(int a, int b) {
int c = a + b;
return c;
}
}
class Overloading extends Sample {

public static int simple(int a, int b) {
int c = a * b;
return c;

}
public static void main(String[] args) {
        Sample sam = new Sample(22, 90);
        Overloading obj = new Overloading();
          obj.simple(10,20); // here the sub class function call
         sam..simple(10,20); // here the super class function call
}
}