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Workbook 4a Module 2 — Exercise 1
Hotel Operations — Create Classes
Build the Room, Reservation, and Employee classes | Workbook p.28–30
The Exercise
Create a new Maven project called hotel-operations. Inside it, build three classes that model parts of a hotel: a Room, a Reservation, and an Employee.
Each class follows the same recipe: private fields, a constructor, and getters (and setters where the workbook says so). Some getters just return a stored field; others calculate a value from other fields — those are derived getters, and they don't need a backing field.
Once all three classes compile, create one of each in Main and print their info to confirm the values come out right.
Class Specs
Room
Knows everything about a hotel room.
- getNumberOfBeds()Returns how many beds are in the room.
- getPrice()Returns the nightly price for this room.
- isOccupied()booleanTrue if a guest is currently in the room.
- isDirty()booleanTrue if the room hasn't been cleaned since last use.
- isAvailable()booleanDerivedA room is available when it is clean AND not occupied. No backing field — calculate from the others.
Reservation
Stores information about a guest stay.
- getRoomType() / setRoomType(String)Either
"king" or "double".
- getNumberOfNights() / setNumberOfNights(int)How many nights the guest is staying.
- isWeekend() / setIsWeekend(boolean)booleanTrue if the reservation falls on a weekend.
- getPrice()DerivedPer-night price based on room type, with a 10% surcharge if it's a weekend.
- getReservationTotal()DerivedTotal cost for the entire stay.
| Room Type | Weekday Price | Weekend Price (+10%) |
|---|
| king | $139.00 | $152.90 |
| double | $124.00 | $136.40 |
Employee
Payroll information for a hotel staff member.
- employeeId, name, department, payRate, hoursWorkedPrivate fields. Add a constructor and standard getters.
- getRegularHours()DerivedHours up to the regular-time cap (no overtime portion).
- getOvertimeHours()DerivedHours past the regular-time cap (only the overtime portion).
- getTotalPay()DerivedCombines regular pay and overtime pay using
payRate.
Flow
New Maven project
→
Build Room.java
→
Build Reservation.java
→
Build Employee.java
→
Test in Main
→
Commit & push
Tip
Every get-style method that calculates instead of just reading a stored field is a derived getter. The workbook tells you which ones are derived — for those, don't add a backing field. Computing from existing fields keeps the data in one place and prevents the two values from disagreeing.
Workbook 4a Module 2, p.28–30 — Exercise 1: Hotel Operations