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Type cast variable in java

   


Type casting is the process of converting a variable from one data type to another. This is especially useful when you're working with different numeric types or when dealing with inheritance in object-oriented programming.

There are two main types of type casting in Java:

1. Widening Casting (Implicit):

This happens automatically when converting a smaller type to a larger type size:

int myInt = 9;

double myDouble = myInt;

2. Narrowing Casting (Explicit):

This must be done manually when converting a larger type to a smaller type:

java :

double myDouble = 9.78;

int myInt = (int) myDouble;

3.Type casting also applies to objects in inheritance hierarchies:

java :

Animal a = new Dog();  // Upcasting (automatic)

Dog d = (Dog) a; 


 class Test{

 public static void main(String args[]){

byte b;

 int i=257;

double d=323.142;

System.out.println("In conversion of byte . ");

 b=(byte)i;

System.out.println("convertion of double to int. ");

i=(int)d;

System.out.println(" d and i " +d+" "+i);

System.out.println("converstion of double byte to byte);

 b=(byte)d;

System.out.println("d and b"+d+" "+b);

            }

}

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