Java Enums can have behavior?

Question

In Java, an Enum can do the great things that Enums do, but can also have methods (behavior and logic). What advantage does that have over using a class using an enum? Simple ex

Answer 1

Take a look at java/joda time classes, where enums do hell of a lot of job.

Here is an example of java.time.Month:

public enum Month implements TemporalAccessor, TemporalAdjuster {
    JANUARY,
    FEBRUARY,
    MARCH,
    APRIL,
    MAY,
    JUNE,
    JULY,
    AUGUST,
    SEPTEMBER,
    OCTOBER,
    NOVEMBER,
    DECEMBER;

    private static final Month[] ENUMS = Month.values();

    public static Month of(int month) {
        if (month < 1 || month > 12) {
            throw new DateTimeException("Invalid value for MonthOfYear: " + month);
        }
        return ENUMS[month - 1];
    }

    // About a dozen of other useful methods go here 

}