What Will Be The Output Of The Following Java Codep Pre #860

 class A { static int a =5; } class B extends A { B() { A.a = 10; } } class C extends A { C() { A.a = 15; } } class D extends A { D() { A.a = 20; } } public class DotOperator { public static void main(String[] args) { B obj1 = new B(); C obj2 = new C(); D obj3 = new D();  System.out.println(A.a); } }