Java Type Casting

In this tutorial, we will learn about the Java Type Casting with the help of an example.

Type casting is nothing but assigning a value of one primitive data type to another. When you assign the value of one data type to another, you should be aware of the compatibility of the data type. If they are compatible, then Java will perform the conversion automatically known as Automatic Type Conversion and if not, then they need to be casted or converted explicitly.

Classification of Type Casting

• Widening Casting(Implicit) :In Widening Type Casting, Java automatically converts one data type to another data type.
  

  
  byte -> short -> char -> int -> long -> float -> double
  

• Narrowing Casting(Explicitly done) :In Narrowing Type Casting, we manually convert one data type into another using the parenthesis.
  

  
  double -> float -> long -> int -> char -> short -> byte
  

Example 1:

Type conversion from int to String

class Codemistic 
{
  	public static void main(String[] args) 
	{
    		// create int type variable
    		int num = 10;
    		System.out.println("The integer value is: " + num);

    		// converts int to string type
    		String data = String.valueOf(num);
    		System.out.println("The string value is: " + data);
  	}
}

Output:

The integer value is: 10
The string value is: 10

Example 2:

Type conversion from String to int

class Codemistic 
{
  	public static void main(String[] args) 
	{
    		// create string type variable
    		String data = "10";
    		System.out.println("The string value is: " + data);

    		// convert string variable to int
    		int num = Integer.parseInt(data);
    		System.out.println("The integer value is: " + num);
  	}
}
Output:

The string value is: 10
The integer value is: 10

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