Enum values().length vs private field

Question

I have enumeration like this:

public enum Configuration {
    XML(1),
    XSLT(10),
    TXT(100),
    HTML(2),
    DB(20);

    private final int id;
    pri         


        

Answer 1

Another approach is to use a constant initialized on top of the values() method.

public enum Colors {
    BLUE, GREEN, FUCHSIA;
    public static int length = Colors.values().length;
}

This way you have an automatically updated constant and still avoid that "values()" overhead.