// The strategy enum pattern enum PayrollDay { MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY(PayType.WEEKEND), SUNDAY(PayType.WEEKEND); private final PayType payType; PayrollDay(PayType payType) { this.payType = payType; } PayrollDay() { this(PayType.WEEKDAY); } // Default
This use of default constructor is hardly less error-prone than the previous example: one can just as easily add HOLIDAY and unintentionally inherit the default strategy.
