How can I access the case of a switch with two conditions in java?

Question

I'm making a program with a menu where the user is asked to select an option labeled by letters:

a) option 1

b) option 2

c) option 3

...

Select an option:

The program needs to be case insensitive so lowercase and uppercase are both accepted. I want to make a switch to organize the different options but as it is case insensitive, do I need to convert the option to lowercase or uppercase or is there an option to enter the case independently of it's lower or upper?

Answer 1

You could use multiple case expressions for the upper and lower cases:

switch (input) {
    case "a":
    case "A":
        doA();
    case "b":
    case "B":
        doB();
    case "c":
    case "C":
        doC();
}

But as you can see, this gets really clunky really fast. Converting everything to lowercase (or uppercase, if you prefer) seems a lot simpler:

switch (input.toLowerCase()) {
    case "a":
        doA();
    case "b":
        doB();
    case "c":
        doC();
}