Java Double doubleValue() Method

The doubleValue() method of Java Double class returns the double value of this Double object.

Syntax

Parameters

Return value

The doubleValue() method returns the double value represented by this object.

Example 1

public class Double_doubleValueMethod_Example1 {
    public static void main(String[] args) {

        // returns the double value of this Double object

        Double obj1=5.7;

        System.out.println( "Result after being converted to double value = "+obj1.doubleValue()*4);

        //method would convert to double value

        Double obj2 = new Double("56");

        System.out.println("Result after being converted to double value = "+obj2.doubleValue()*4);
 }

}

Test it Now

Output:

Result after being converted to double value = 22.8
Result after being converted to double value = 224.0

Example 2

public class Double_doubleValueMethod_Example2 {
 
    public static void main(String[] args) {
 
    double obj1=5.7;

        System.out.println("double value = "+obj1);

        System.out.println( "Result after being converted to double value = "+obj1.doubleValue());

      }
   
}

Test it Now

Output:

Error:(13, 83) java: double cannot be dereferenced

Double is a primitive data type. Its object cannot be used to call the Double class method. If you do so, it will give an error like above.

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