Explicit type casting.

[SABYASACHI S GUPTA]

I have 3 files to test this.

//A.java
public class A {
        public void method(){
                System.out.println("In A");
        }
}


//B.java
public class B extends A {

        public void method()
        {
                System.out.println("hello world");
        }
}

//mymain.java

import A;
import B;

public class mymain{

        public static void main(String args[])
        {
                B b=new B();
                A a=new A();

                b = (B)a;

                b.method();
        }
}

Since this requires an explicit cast I did just that
But I get a runtime error

Exception in thread "main" java.lang.ClassCastException: A
        at mymain.main(Compiled Code)

Any help?????


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