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Java Integer doubleValue() Method

By Chaitanya Singh | Filed Under: java

The doubleValue() method returns the value of this Integer as double after performing widening primitive conversion.

Hierarchy:

java.lang Package
    -> Integer Class
        -> doubleValue() Method 

Syntax of doubleValue() method

public double doubleValue()

doubleValue() Parameters

NA

doubleValue() Return Value

  • A double data type value equivalent to the value of this Integer object numerically.

Supported java versions: Java 1.2 and onwards.

Example 1

public class JavaExample {
  public static void main(String[] args) {
    Integer i = new Integer("55");
    Integer i2 = new Integer(97);
    double d = i.doubleValue();
    double d2 = i2.doubleValue();
    System.out.println("Value of Integer i as double: "+d);
    System.out.println("Value of Integer i2 as double: "+d2);
  }
}

Output:

Java Integer doubleValue Ex Output

Example 2

public class JavaExample {
  public static void main(String[] args) {
    int num = 100; //primitive int
    Integer i = new Integer(num); //int to Integer object
    double d = i.doubleValue();
    System.out.println("Value of num as double: "+d);
  }
}

Output:

Integer doubleValue Method Output

Example 3

import java.util.Scanner;
public class JavaExample{
  public static void main(String[] args){
    Integer i;
    Scanner scan = new Scanner(System.in);
    System.out.print("Enter first int number: ");
    i = scan.nextInt();

    double val  = i.doubleValue();
    System.out.println("Entered value as double: "+val);
  }
}

Output:

Java Integer doubleValue Output

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❮ Java Integer

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