How to get an enum value from a string value in Java?

Question

Say I have an enum which is just

public enum Blah {
    A, B, C, D
}

and I would like to find the enum value of a string, for example

Answer 1

To add to the previous answers, and address some of the discussions around nulls and NPE I'm using Guava Optionals to handle absent/invalid cases. This works great for URI/parameter parsing.

public enum E {
    A,B,C;
    public static Optional fromString(String s) {
        try {
            return Optional.of(E.valueOf(s.toUpperCase()));
        } catch (IllegalArgumentException|NullPointerException e) {
            return Optional.absent();
        }
    }
}

For those not aware, here's some more info on avoiding null with Optional: https://code.google.com/p/guava-libraries/wiki/UsingAndAvoidingNullExplained#Optional