Java - Long Class doubleValue() Method

Long class doubleValue() method: Here, we are going to learn about the doubleValue() method of Long class with its syntax and example. By Preeti Jain Last updated : March 19, 2024

Long class doubleValue() method

  • doubleValue() method is available in java.lang package.
  • doubleValue() method is used to return the value denoted by this Long object converted to type double (by casting).
  • doubleValue() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • doubleValue() method does not throw an exception at the time of conversion from Long to double.

Syntax

public double doubleValue();

Parameters

  • It does not accept any parameter.

Return Value

The return type of this method is double, it returns a converted (from type Long to double) value represented by this Long object.

Example

// Java program to demonstrate the example 
// of doubleValue() method of Long class

public class DoubleValueOfLongClass {
    public static void main(String[] args) {

        // Variables initialization
        long l1 = 20;
        long l2 = 30;

        // It returns double value denoted by this Long ob1 object
        // and converted to a double by calling ob1.doubleValue()
        Long ob1 = new Long(l1);

        // Display ob1 result
        System.out.println("ob1.doubleValue(): " + ob1.doubleValue());

        // It returns double value denoted by this Long ob2 object
        // and converted to a double by calling ob2.doubleValue()
        Long ob2 = new Long(l2);

        // Display ob2 result
        System.out.println("ob2.doubleValue(): " + ob2.doubleValue());
    }
}

Output

ob1.doubleValue(): 20.0
ob2.doubleValue(): 30.0

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