Complete the following statement that finds the average salary of employees who are Database Administrators.Assume that employeeStream is a stream of Employee objects and the getSalary method returns the employee's salary as an integer.Also, assume the getTitle method returns a String representing the employee's title. A)Optional B)OptionalDouble C)double D)Double

Question

Complete the following statement that finds the average salary of employees who are Database Administrators.Assume that employeeStream is a stream of Employee objects and the getSalary method returns the employee's salary as an integer.Also, assume the getTitle method returns a String representing the employee's title.  
A)Optional<Double> 
B)OptionalDouble 
C)double 
D)Double

Quizplus · Accepted Answer

OptionalDouble is the best choice because it allows us to handle the possibility of no Database Administrators being present in the stream, while also providing a way to obtain the average salary as a primitive double value. Optional<Double> could also be used, but it would require unboxing to obtain the primitive double value which could lead to NullPointerExceptions if the Optional is empty.

Complete the Following Statement That Finds the Average Salary of Employees