Java Program to Convert int to Double

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In the previous article we have discussed Java Program to Convert int to long

In this article we will see how to convert an integer type to double type.

Program to Convert int to Double

Before going into the program directly, let’s see some examples of both the types.

Example-1: int type

int a = 23;
int b=5;
Example-2: double type 

double a = 3.123456789; 
double b = 3.55502;

Let’s see different ways to do it.

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Method 1 : Java Program to Convert int to Double Using typecasting

int type variable can be converted to double type by using  typecasting let’s see how it actually works.

Here this method is also called widening typecasting because in this  the lower data type int  is converted into the higher data type double.

Approach :

  1. Take an int value and store it in a int variable input1.
  2. Typecast the variable with double and store it in a variable output .
  3. Display the result .

Program:

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
    // creating scanner object
    Scanner sc = new Scanner(System.in);
    // input a int value through scanner class
    System.out.print("Enter an int value : ");
    int input1=sc.nextInt();
    // converting to Double
    double output= input1 ;
    System.out.println("Converted Double value is : " + output);
    }
}
Output : 

Enter an int value : 6
Converted Double value is : 6.0

Method 2 : Java Program to Convert int to Double Using valueof() method

int type variable can be converted to double type by using  valueof() , let’s see how it actually works.

Here, the valueof() method will convert the int type variable into double type variable  and returns it.

Approach :

  1. Take an int type value and store it in a int variable input1.
  2. Then pass that input1 variable as parameter to valueof() method which will convert the int to double value and return it .
  3. Store that Double value  in a variable output .
  4. Display the result .

Program:

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
    // creating scanner object
    Scanner sc = new Scanner(System.in);
    // input an int value through scanner class
    System.out.print("Enter an int value : ");
    int input1=sc.nextInt();
    // converting to Double
    Double output= Double.valueOf(input1);
    System.out.println("Converted Double value is : " + output);
    
    }

}
Output : 

Enter a Int value : 6
Converted Double value is : 6.0

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