You have a minor misspelling in the following sentence:
To explain theIt should be separated instead of seperated.in()predicate, we will require the user to enter multiple strings seperated by commas and then click theGObutton, we will then save that string in aStringarray using thespilt()method and,as the delimeter, we will then pass theString arrayas the second argument for thein()predicate and then use the `Case.