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Java Double class doubleValue() method with example

Double class doubleValue() method: Here, we are going to learn about the doubleValue() method of Double class with its syntax and example.
Submitted by Preeti Jain, on September 22, 2019

Double class doubleValue() method

  • doubleValue() method is available in java.lang package.
  • doubleValue() method is used to return the value denoted by this Double 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 Double to double.

Syntax:

    public double doubleValue();

Parameter(s):

  • It does not accept any parameter.

Return value:

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

Example:

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

public class DoubleValueOfDoubleClass {
    public static void main(String[] args) {
        // Variables initialization
        double d1 = 18.20;
        double d2 = 19.20;

        // It returns double value denoted by this Double do1 object
        // and converted to a double by calling do1.doubleValue()
        Double do1 = new Double(d1);

        // Display do1 result
        System.out.println("do1.doubleValue(): " + do1.doubleValue());

        // It returns double value denoted by this Double do2 object
        // and converted to a double by calling do2.doubleValue()
        Double do2 = new Double(d2);

        // Display do2 result
        System.out.println("do2.doubleValue(): " + do2.doubleValue());
    }
}

Output

do1.doubleValue(): 18.2
do2.doubleValue(): 19.2





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