Static control flow in Parent to child Relationship - rahul00773/JavaConcepts GitHub Wiki

Whenever we are executing child class the following sequence of events will be executed automatically as part of static control flow.

1. Identification of static members from parent to child. [1-11]
2. Execution of static variable assignment and static blocks from Parent to child.[12-22]
3. Execution of only child class main method. [23-25]

class Base{

static int x=10; //1 int x=0 //7 //12

static{ //2
m1(); // 13 System.out.println(“First Static Block”); ///15

}

public static void main(String[] args){ //3 m1(); // 13

System.out.println(“Main Method”);

}

Public static void m1(){ ////4 //14

System.out.println(j);// / j=0 //9 }

static int j =20; //5 // 12 j =20 // 16 }

class Deriver extends Base{ static int I=100; // 6. ///17

static{ //7 m2(); // 18 System.out.println(“Derived first Static Block”); ////20

}

public static void main(String[] args){ //8 m2(); // 13 ////23

System.out.println(“Derived Main Method”); ///25

}

Public static void m2(){ ///9 //14

System.out.println(y);// / j=0 //9 ///19///24 }

static{ //10 System.out.println(“Derived second Static Block”); ///21 }

static int y =200; //11 //22

}

// Output:

0 First Static Block 0 Derived first Static Block Derived second Static Block 200 Derived Main Method

##Note:

Whenever we are loading child class automatically parent class will be loaded. But whenever we are loading parent class child class won’t be loaded.[Because parent class members by default available to the child class whereas child class members by default won’t available to the parent]