Data Type Conversion in Java

In this article you will learn about Data Type Conversion in Java

Introduction 

 

Typecasting is a technique in which we convert one type of value into another type of value. There are two types of typecasting.

1. Narrowing

2. Widening

Narrowing: 

 

Narrowing typecasting is also known as explicitly typecasting. In this type of casting there is a chance of data loss. Then java produces an error message “Possible loss of precession.”

To remove this error we must explicitly typecast.

 

Example:

class Narrowing {
 public static void main(String… args) {
  int I;
  double d = 1.0;
  i = (int) d;
  System.out.print(i);
 }
}

Widening:

 

When the lower data type is assigned to a higher data type then there is no chance of data loss. So this type of conversion is automatically done by java. 

class Widening {
 public static void main(String… args) {
  int I = 5;
  double d;
  d = i;
  System.out.print(d);
 }
}