Explicit Object

Accepted answer

Hi Vikas,

If you assign a super class object to a variable of a sub class data type, you need to do explicit casting.

Whenever you assign super class object to sub class object , explicit object casting is needed.
If you assign sub class object to super class object, no object casting is needed.

We know that Object class is super class for all class.

Object obj=new Object( );
Customer e=(Customer) obj;

Thanks

Vikas Mishra14y ago

Thanks...........

Vulpes14y ago

Notice though that the cast will only succeed at runtime if the super-class variable actually refers to an object of the sub-class to which it is being cast.

So, Satyapriya's code above:

Object obj= new Object();

Customer e = (Customer)obj;

compiles OK but produces an exception at runtime because 'obj' doesn't actually refer to a Customer object.

However, the following compiles and runs fine:

Object obj= new Customer();

Customer e = (Customer)obj;