java.lang.ClassException: A cannot be cast into B

Question

I implemented this code:

class A {
    //some code
}
class B extends A {
    // some code
}

class C {
    public static void main(String []args)
    {
              


        

Answer 1

A a1 = (B) new A();

Because A is NOT B.

Compile time works because you are casting and explicitly guaranteeing compiler that you are sure at runtime A will be B .