private enum Weekday {
MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY;
public static final EnumSet<Weekday> WORKDAYS = EnumSet.range(MONDAY, FRIDAY);
public final boolean isWorkday() {
return WORKDAYS.contains(this);
}
public static final EnumSet<Weekday> THE_WHOLE_WEEK = EnumSet.allOf(Weekday.class);
}
Read full article from Fun with EnumSet | Java.net
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