Casting is a mass production process which involves molten 
materials (such as metals, plastics or resins) being poured 
into a mold, allowed to solidify and then extracted for 
use. Casting can be thought of as a method for reproducing 
something - whether a mere part or a single unit by itself.

Casting is a process that can be used to manufacture 
complex parts which would prove too expensive or time-
consuming to produce using other methods such as cutting or 
shaping these from solid materials.

The object will be convert into another object type through 
casting. This is known as cating

Casting means converting values from one data type  to  
other data type.For example to convert the  int values to 
float type vlaues.

Types of casting:
   1. Downcasting -source is larger than destination type
   2. upcasting   - Source is smaller than destination type.

casting can be applicable to both primitive type and Object 
type.

primitive type - convert numeral to floating point and vice 
versa.
Object type - converting from subclass to super class or 
vice versa.
             superClassObj = subClassObj;