TYPE CASTING

Type casting

• Converting one data type into another type is known as type casting.
• There are three types of type casting we have

1. Primitive type casting
2. Non primitive type casting
3. Primitive to non primitive type casting

Primitive type casting:

• Converting from one primitive data type to another primitive data type is known as primitive type casting
• There are two types of primitive type casting
• Widining
• Narrowing

Widining:

• Conversion from one smaller primitive data type into the bigger primitive data type is known as widining.
• Widining happens automatically by the compiler.
• In there is no data loss hence it is known as implicit (Internal) type casting.

Program

1. class TypeCasting
2. {  
3. public static void main(String [] args)
4. {
5. byte b= 24;
6. byte a= b;
7. {
8. System.out.println(a);
9. }
10. }
11. } 

Output:

24                                                          

                                                              
                                                              

Narrowing:

• Conversion from one bigger primitive data type to a smaller primitive data type is known as narrowing.
• We can actually narrowing with the help of type cast operator.
• In narrowing we will be e having data loss hence it is also known as explicit type casting.

Type cast operator:

• Conversion from one data type to another data type is respective of size.

Syntax 

  date type varname = (converting data type) vaiable/value 

1. class TypeCastOperator
2. {  
3. public static void main(String [] args)
4. {
5. int b= 1024;
6. byte a=(byte) b;
7. {
8. System.out.println(a);
9. }
10. }
11. } 

Output:

1024