Java  Upcasting  and Downcasting

  Upcasting

• The process of adding a sub-class object to a super-class reference variable is called upcasting.

A  a = new B();

    

Downcasting

•  The process of getting a sub-class object  placed in a  super 
       
   class variable back to the same sub-class reference is called downcasting.
  
  

B b = (B) a;

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