ClassCastException

Question

i have two classes in java as:

class A {

 int a=10;

 public void sayhello() {
 System.out.println(\"class A\");
 }
}

class B extends A {

 int a=20;

 pub         


        

Answer 1

First do it like this :

  A aClass = new B(); 

Now do your Explicit casting, it will work:

   B b = (B) aClass;

That mean's Explicit casting must need implicit casting. elsewise Explicit casting is not allowed.