Code In Java Please

It's not unusual in programming to have to determine something about something and if it can be used further down in the program. In this program you are going to determine if a function is injective (one-to-one) given the domain 1 through 100.

These are the functions your program needs to test:

t: Z Z. t(x) = 3x

t: Z Z. t(x) = x²

t: Z Z. t(x) = 2x - 2

I like to have all of our programs have some kind of user input so please create a menu where I can pick which function I would like to test. Your code should not hard code the answer but instead test the functions given the domain and determine if they are an injective (or one-to-one) function.