java.lang.Long doubleValue()


The doubleValue() java method returns the value of this Long as a double after a widening primitive conversion.


  • This method is specified by doubleValue in class Number.

Method Syntax

public double doubleValue()

Method Argument

Data Type Parameter Description

Method Returns

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


Requires Java 1.0 and up

Java Long doubleValue() Example

Below is a simple java example on the usage of doubleValue() method of Long class.


 * This example source code demonstrates the use of  
 * doubleValue() method of Long class

public class LongDoubleValueExample {

	public static void main(String[] args) {

		// Declare a new Long variable
		Long value = 123l;

		// get the doubleValue() method result
		double result = value.doubleValue();

		// print the result
		System.out.println("Result:" + result);
		 * Be careful on using this method
		 * Desired result might differ
		 * because of the widening concept
		 * of java language



Sample Output

Below is the sample output when you run the above example.

Java Long doubleValue() example output