Java (beginner): creating a menu that displays features of a calculator -

i started java class during associates software engineer track , having difficulty understanding language.

i need create menu displays features of calculator, output should display console this:

what do?

a.) add 2 numbers.
b.) subtract 2 numbers.
c.) multiply 2 numbers.
d.) divide 2 numbers.

please enter letter.

then need choice(input) user, grab 2 numbers(input) user.

i don't know begin. started class , we're diving head first.

any & appreciated!

you can use scanner class.

for example:

java.util.scanner in = new java.util.scanner(system.in); string input = in.nextline(); switch (input.tolowercase()) {     case "a":         system.out.println("option \"a\" selected;");         break;     case "b":         system.out.println("option \"b\" selected;");         break;