Java Integer doubleValue() method with Examples

by Online Tutorials Library July 22, 2022

Java Integer doubleValue() method

The doubleValue() method is a static method of Integer class under java.lang package. This method returns the value of this Integer as a double equivalent. This method is specified by Number class and may involve rounding or truncation.

Syntax

Following is the declaration of doubleValue() method:

Parameter:

DataType	Parameter	Description
NA	NA	This method does not accepts any parameter.

Returns:

The doubleValue() method returns the numeric value represented by this object after conversion to type double.

Exceptions:

Compatibility Version:

Java 1.2 and above

Example 1

  public class IntegerDoubleValueExample1 {  public static void main(String[] args) {  // returns the Double value of this Double object        Double dobj = new Double(“23.45”);        double d = dobj.doubleValue();        System.out.println(“Double value of the object is = ” + d);            dobj = new Double(“55”);        d = dobj.doubleValue();        System.out.println(“Double value of the object is = ” + d);  }  }  

Test it Now

Output:

Double value of the object is = 23.45  Double value of the object is = 55.0

Example 2

  import java.util.Scanner;  public class IntegerDoubleValueExample2 {  public static void main(String[] args) {  //Input your value  System.out.print(“Enter the Desired Value : “);  Scanner sc = new Scanner(System.in);              //Get value from user console  int i = sc.nextInt();  sc.close();  Integer myValue = new Integer(i);  double value = myValue.doubleValue();  System.out.println(“Double Value is: ” + value);  }  }  

Output:

Enter the Desired Value : 45654  Double Value is: 45654.0

Example 3

  import java.util.Scanner;  public class IntegerDoubleValueExample3 {  public static void main(String[] args) {  System.out.print(“Enter the Integer Value : “);  Scanner sc = new Scanner(System.in);              //Get value from user console        int i = sc.nextInt();        sc.close();        //number as integer  Integer x = new Integer(i);  //number as float  Float y = new Float(64543735f);  //print value as double  System.out.println(“X = “+ x.doubleValue());  System.out.println(“Y = ” +y.doubleValue());  }  }  

Output:

Enter the Integer Value : 5745  X = 5745.0  Y = 6.4543736E7

Example 4

  import java.math.BigInteger;  public class IntegerDoubleValueExample4 {  public static void main(String[] args) {            //Declare and initialize our BigInteger values   BigInteger obj1 = new BigInteger(“452”);   BigInteger obj2 = new BigInteger(“123233243564578”);   //Get the double value of each BigInteger   double dVal1 = obj1.doubleValue();   double dVal2 = obj2.doubleValue();    //Print the operation   System.out.println(“The first object in double is = “+dVal1);   System.out.println(“The second object in double is = “+dVal2);      }  }  

Test it Now

Output:

The first object in double is = 452.0  The second object in double is = 1.23233243564578E14

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Java Integer doubleValue() method with Examples

Java Integer doubleValue() method

Syntax

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

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