Using Java:

$$ Develop an online calculator capable of basic arithmetic operations: addition, subtraction, multiplication, and division.

$$ Modify both server and client programs for the client to request arithmetic computations from the server.

$$ Upon receiving a request from the client, such as $"10+20",$ the server computes and returns the result to the client.

$$ Implement the following interface for the calculator service:

public interface CalculatorService $\{$

public double add$($double firstValue, double secondValue$)$;

public double sub$($double firstValue, double secondValue$)$;

public double div$($double firstValue, double secondValue$)$;

public double mul$($double firstValue, double secondValue$)$;

$\}$

$$ Sample output: user input underlined.

Online Calculator

$-----------------------$

$1)$ Addition

$2)$ Subtraction

$3)$ Division

$4)$ Multiplication

$5)$ Exit

Choice: $1$

Enter First Number: $3$

Enter Second Number: $5$

$2\mathrm{.}0+4\mathrm{.}0=6\mathrm{.}0$

Grading Rubric:

$(5$ pts$)$ Implement Interface

$(5$ pts$)$ Implement client program.

$(5$ pts$)$ Implement server program.

$(5$ pts$)$ Handling a menu.