Java enum reverse look-up best practice

Question

I saw it suggested on a blog that the following was a reasonable way to do a \"reverse-lookup\" using the getCode(int) in a Java enum:

public en         


        

Answer 1

Here is an alternative which may be even a bit faster:

public enum Status {
    WAITING(0),
    READY(1),
    SKIPPED(-1),
    COMPLETED(5);

    private int code;

    private Status(int code) {
        this.code = code;
    }

    public int getCode() { return code; }

    public static Status get(int code) {
        switch(code) {
            case  0: return WAITING;
            case  1: return READY;
            case -1: return SKIPPED;
            case  5: return COMPLETED;
        }
        return null;
    }
}

Of course, this is not really maintainable if you want to be able to add more constants later.