Multilevel & Hierarchical Inheritance

// Multilevel

class A{
    int a=5;
}
class B extends A{
    int  b = 5;
}
class C extends B{
    void sum(){
        System.out.println(a+b);
    }
}
public class Main
{

    public static void main(String[] args) {
        C obj = new C();
        obj.sum();
    }
}
// Output : 10

// Hierarchical Inheritance
class A{
    int a=5,b=6;
}
class B extends A{
    void mul(){
        System.out.println("multiply "+a*b);
    }
}
class C extends A{
    void sum(){
        System.out.println("Addition "+a+b);
    }
}
public class Main
{

    public static void main(String[] args) {

        B obj_b = new B();
        C obj_c = new C();

        obj_b.mul();
        obj_c.sum();

    }
}
// Output : multiply 30
//          Addition 11