Basic calculator in Java
You really don't need:

    System.out.print("Enter your first number: ");
    numOne = userInput.nextFloat();
    System.out.print("Enter your second number: ");
    numTwo = userInput.nextFloat();


four times. Just get the function first and then the two numbers independent of which function was chosen.

Also, do you really need to write functions for simple mathematical operations?

Finally, you don't need getAnswer(answer); four times either.