From e9f83469ebbabd0961b49b8c3ab133852026fa33 Mon Sep 17 00:00:00 2001 From: Ramtin Jafari Date: Mon, 6 Jul 2026 21:44:39 +0330 Subject: [PATCH] commit everything at once like an amateur (the mandatory part + bonus part) --- src/main/java/org/Main.java | 162 ++++++------------- src/main/java/org/model/Car.java | 53 +++--- src/main/java/org/model/ElectricCar.java | 61 ++++--- src/main/java/org/model/GasCar.java | 61 ++++--- src/main/java/org/model/HybridCar.java | 85 ++++++++++ src/main/java/org/model/SportsCar.java | 32 ++-- src/main/java/org/model/Vehicle.java | 42 +++-- src/main/java/org/util/VehicleInspector.java | 27 ++-- 8 files changed, 314 insertions(+), 209 deletions(-) create mode 100644 src/main/java/org/model/HybridCar.java diff --git a/src/main/java/org/Main.java b/src/main/java/org/Main.java index 7a3d8c8..ac51664 100644 --- a/src/main/java/org/Main.java +++ b/src/main/java/org/Main.java @@ -1,126 +1,66 @@ package org; +import org.behavior.Serviceable; +import org.model.*; +import org.util.VehicleInspector; + public class Main { public static void main(String[] args) { - // ============================================================ - // TODO 1: - // Create one instance of each vehicle type: - // - ElectricCar - // - GasCar - // - SportsCar - // - // Requirements: - // • Use the constructors you created in each class. - // • Provide realistic values (brand, model, year, mileage, etc.). - // • Store them in variables such as: - // ElectricCar tesla = new ElectricCar(...); - // ============================================================ + ElectricCar tesla = new ElectricCar( + "Tesla", "Model S", 2022, 1000, + 100, 550, 50 // batteryCapacity, range + ); + + GasCar toyota = new GasCar( + "Toyota", "Corolla", 2018, 85000, + 5, 50, "Petrol" // seats, fuelCapacity, fuelType + ); + + SportsCar ferrari = new SportsCar( + "Ferrari", "F8 Tributo", 2021, 12000, + 2, 3.9, "oil", 710 // seats, engineSize, horsepower + ); + + HybridCar hybridCar = new HybridCar( + "Toyota", "Prius", 2026, 23000, + 5, 67, "Petrol", 500, 34.5 + ); + Vehicle[] vehicles = {tesla, toyota, ferrari, hybridCar}; + + System.out.println("the provided vehicles' info is as follows:\n"); + for (Vehicle v : vehicles) { + v.basicInfo(); + System.out.println(); + } + + System.out.println("Inspecting the vehicles"); + for (Vehicle v : vehicles){ + VehicleInspector.inspect(v); + System.out.println(); + } - - // ============================================================ - // TODO 2: - // Create an array of Vehicle: - // Vehicle[] vehicles = { ... }; - // - // This array MUST contain the objects created above. - // This demonstrates **polymorphism** because all different - // subclasses (ElectricCar, GasCar, SportsCar) are stored - // as their parent type (Vehicle). - // ============================================================ - - - - - - // ============================================================ - // TODO 3: - // Loop through the Vehicle[] array and: - // • Call v.basicInfo(); - // • Print a blank line after each. - // - // Purpose: - // Demonstrate that all subclasses share the same Vehicle - // behavior and can call inherited methods. - // ============================================================ - - - - - - // ============================================================ - // TODO 4: - // Use VehicleInspector to inspect each vehicle: - // - // VehicleInspector.inspect(v); - // - // Purpose: - // • Demonstrate the use of `instanceof` - // • Show subclass‑specific inspection messages - // ============================================================ - - - - - - // ============================================================ - // TODO 5: - // Create an array of Serviceable: - // Serviceable[] serviceables = { ... }; - // - // This demonstrates **interface‑based polymorphism**. - // Every Car subtype implements Serviceable. - // - // IMPORTANT: - // • You must cast to Vehicle when needed: - // Vehicle v = (Vehicle) s; - // - // ============================================================ - - - - - - // ============================================================ - // TODO 6: - // Loop through the Serviceable[] array: - // - // Steps inside loop: - // - // 1. Cast the current object to Vehicle: - // Vehicle v = (Vehicle) s; - // - // 2. Check: - // if (s.needsService(v)) { ... } - // - // 3. If true: - // - Print a message showing brand + model - // - Call s.performService(); - // - // 4. Otherwise: - // - Print that the car does not need service - // - // Add blank lines between each item for readability. - // ============================================================ - - - - - - // ============================================================ - // TODO 7 (Optional): - // After everything is done, print a final message: - // - // System.out.println("=== Workshop Completed ==="); - // - // ============================================================ - + Serviceable[] serviceables = {tesla, toyota, ferrari, hybridCar}; + for (Serviceable car : serviceables){ + Vehicle v = (Vehicle) car; + + if (car.needsService(v)) { + System.out.println(v.getBrand() + " " + v.getModel()); + car.performService(); + } + else { + System.out.println("this car: " + v.getBrand() + " " + v.getModel() + "\ndoes not require to be serviced"); + } + + System.out.println(); + } + System.out.println("=== Workshop Completed ==="); } } diff --git a/src/main/java/org/model/Car.java b/src/main/java/org/model/Car.java index 74836b5..cc531cd 100644 --- a/src/main/java/org/model/Car.java +++ b/src/main/java/org/model/Car.java @@ -1,41 +1,44 @@ package org.model; -/* - * Car extends Vehicle. - * This class SHOULD implement Serviceable. - * - * Service logic for Car: - * - needsService(): return true if mileage > 10,000 - * - performService(): print "General car service completed" - */ - import org.behavior.Serviceable; public abstract class Car extends Vehicle implements Serviceable { - private int seats; + private final int seats; public Car(String brand, String model, int year, double mileage, int seats) { - // TODO: Call super constructor + super(brand, model, year, mileage); + this.seats = seats; } - // TODO: Override getEnergyType() → return "Unknown" + @Override + public String getEnergyType() + { + return "Unknown"; + } - // TODO: Override showDetails() - // Print brand, model, year, mileage, and number of seats + @Override + public void showDetails() + { + basicInfo(); - /* - * Implement Serviceable methods: - * - * needsService(Vehicle v): - * - Check the mileage of the current car - * - If mileage > 10000 return true - * - Otherwise return false - * - * performService(): - * - Print: "General car service completed" - */ + System.out.println( + "Number of seats: " + seats + ); + } + + @Override + public boolean needsService(Vehicle v) { + double carMileage = getMileage(); + + return carMileage > 10000; + } + + @Override + public void performService() { + System.out.println("General car service completed"); + } } diff --git a/src/main/java/org/model/ElectricCar.java b/src/main/java/org/model/ElectricCar.java index 2ee9bd8..446bea9 100644 --- a/src/main/java/org/model/ElectricCar.java +++ b/src/main/java/org/model/ElectricCar.java @@ -1,21 +1,10 @@ package org.model; -/* - * ElectricCar extends Car. - * It already inherits Serviceable from Car. - * - * Service logic for ElectricCar: - * - needsService(): return true if mileage > 8000 - * - performService(): - * Print "Battery system checked" - * Reset chargeLevel to 100 - */ - import org.behavior.Chargeable; public class ElectricCar extends Car implements Chargeable { - private int batteryCapacity; + private final int batteryCapacity; private double chargeLevel; public ElectricCar(String brand, String model, int year, @@ -27,13 +16,47 @@ public class ElectricCar extends Car implements Chargeable { this.chargeLevel = chargeLevel; } - // TODO: Override getEnergyType() → return "Electric" + @Override + public String getEnergyType() { + return "Electric"; + } - // TODO: Override showDetails() - // Call super.showDetails() - // Print battery capacity and charge level + @Override + public void showDetails() + { + super.showDetails(); - // TODO: Implement charge(double amount) - // Validate negative - // Cap at 100 + System.out.println( + "Battery capacity: " + batteryCapacity + + "| Charge level: " + chargeLevel + ); + } + + + @Override + public void charge(double amount) { + if (amount <= 0) { + System.out.println("An error occurred while charging the vehicle, value must be bigger than zero, " + amount + " is not"); + } + + if (chargeLevel + amount > 100) { + System.out.println("An error occurred while charging the vehicle, by adding this amount: " + amount + " vehicle's charge level exceeds battery capacity"); + } + + chargeLevel += amount; + } + + @Override + public void performService() { + super.performService(); + + System.out.println("Battery system checked"); + + chargeLevel = 100; + } + + @Override + public boolean needsService(Vehicle v) { + return getMileage() > 8000; + } } diff --git a/src/main/java/org/model/GasCar.java b/src/main/java/org/model/GasCar.java index 2109f93..6910546 100644 --- a/src/main/java/org/model/GasCar.java +++ b/src/main/java/org/model/GasCar.java @@ -1,22 +1,11 @@ package org.model; -/* - * GasCar extends Car. - * Inherits Serviceable from Car. - * - * Service logic for GasCar: - * - needsService(): return true if mileage > 12000 - * - performService(): - * Print "Engine oil changed" - * Reset fuelLevel to 100 - */ - import org.behavior.Refuelable; public class GasCar extends Car implements Refuelable { private double fuelLevel; - private String fuelType; + private final String fuelType; public GasCar(String brand, String model, int year, double mileage, int seats, @@ -27,13 +16,47 @@ public class GasCar extends Car implements Refuelable { this.fuelType = fuelType; } - // TODO: Override getEnergyType() → return fuelType + " (Gas)" + @Override + public String getEnergyType() { + return fuelType + " (Gas)"; + } - // TODO: Implement refuel(double amount) - // Validate amount - // Cap at 100 + @Override + public void refuel(double amount) { + if (amount <= 0) { + System.out.println("An error occurred while refueling the vehicle, value must be bigger than zero, " + amount + " is not"); + } - // TODO: Override showDetails() - // Call super.showDetails() - // Print fuel level and fuel type + if (fuelLevel + amount > 100) { + System.out.println("An error occurred while refueling the vehicle, by adding this amount: " + amount + " vehicle's charge level exceeds battery capacity"); + } + + fuelLevel += amount; + } + + @Override + public void showDetails() { + super.showDetails(); + + System.out.println( + "Fuel level: " + fuelLevel + + "| Fuel type: " + fuelType + ); + } + + @Override + public boolean needsService(Vehicle v) { + double mileage = getMileage(); + + return mileage > 12000; + } + + @Override + public void performService() { + super.performService(); + + System.out.println("Engine oil checked"); + + fuelLevel = 100; + } } diff --git a/src/main/java/org/model/HybridCar.java b/src/main/java/org/model/HybridCar.java new file mode 100644 index 0000000..bec7de3 --- /dev/null +++ b/src/main/java/org/model/HybridCar.java @@ -0,0 +1,85 @@ +package org.model; + +import org.behavior.Chargeable; +import org.behavior.Refuelable; + +public class HybridCar extends Car implements Chargeable, Refuelable { + + private double fuelLevel; + private final String fuelType; + private final int batteryCapacity; + private double chargeLevel; + + public HybridCar(String brand, String model, int year, + double mileage, int seats, + double fuelLevel, String fuelType, + int batteryCapacity, double chargeLevel) { + + super(brand, model, year, mileage, seats); + this.fuelLevel = fuelLevel; + this.fuelType = fuelType; + this.batteryCapacity = batteryCapacity; + this.chargeLevel = chargeLevel; + } + + @Override + public String getEnergyType() { + return "Hybrid (Electric + " + fuelType + ")"; + } + + @Override + public void showDetails() { + super.showDetails(); + + System.out.println( + "Fuel level: " + fuelLevel + + "| Fuel type: " + fuelType + ); + + System.out.println( + "Battery capacity: " + batteryCapacity + + "| Charge level: " + chargeLevel + ); + } + + @Override + public void charge(double amount) { + if (amount <= 0) { + System.out.println("An error occurred while charging the vehicle, value must be bigger than zero, " + amount + " is not"); + } + + if (chargeLevel + amount > 100) { + System.out.println("An error occurred while charging the vehicle, by adding this amount: " + amount + " vehicle's charge level exceeds battery capacity"); + } + + chargeLevel += amount; + } + + @Override + public void refuel(double amount) { + if (amount <= 0) { + System.out.println("An error occurred while refueling the vehicle, value must be bigger than zero, " + amount + " is not"); + } + + if (fuelLevel + amount > 100) { + System.out.println("An error occurred while refueling the vehicle, by adding this amount: " + amount + " vehicle's charge level exceeds battery capacity"); + } + + fuelLevel += amount; + } + + @Override + public void performService() { + super.performService(); + + System.out.println("Engine oil changed and battery system checked"); + + fuelLevel = 100; + chargeLevel = 100; + } + + @Override + public boolean needsService(Vehicle v) { + return getMileage() > 10000; + } +} diff --git a/src/main/java/org/model/SportsCar.java b/src/main/java/org/model/SportsCar.java index 25f5df9..091df42 100644 --- a/src/main/java/org/model/SportsCar.java +++ b/src/main/java/org/model/SportsCar.java @@ -1,14 +1,5 @@ package org.model; -/* - * SportsCar extends GasCar. - * - * Special service logic for SportsCar: - * - needsService(): return true if mileage > 5000 - * - performService(): - * Print "High-performance brake system checked" - */ - public class SportsCar extends GasCar { private double zeroToHundred; @@ -24,7 +15,24 @@ public class SportsCar extends GasCar { this.zeroToHundred = zeroToHundred; } - // TODO: Override showDetails() - // Call super.showDetails() - // Print acceleration time + @Override + public void showDetails() { + super.showDetails(); + + System.out.println( + "Acceleration time: " + zeroToHundred + ); + } + + @Override + public boolean needsService(Vehicle v) { + return getMileage() > 5000; + } + + @Override + public void performService() { + super.performService(); + + System.out.println("High-performance brake system checked"); + } } diff --git a/src/main/java/org/model/Vehicle.java b/src/main/java/org/model/Vehicle.java index 70615a9..b4006ef 100644 --- a/src/main/java/org/model/Vehicle.java +++ b/src/main/java/org/model/Vehicle.java @@ -1,16 +1,10 @@ package org.model; -/* - * Abstract base class for all vehicles. - * This class DOES NOT implement Serviceable. - * Service behavior will be defined in concrete subclasses. - */ - public abstract class Vehicle { - private String brand; - private String model; - private int year; + private final String brand; + private final String model; + private final int year; private double mileage; public Vehicle(String brand, String model, int year, double mileage) { @@ -21,12 +15,34 @@ public abstract class Vehicle { } // TODO: Create getters for all fields + public String getBrand() + { + return brand; + } - // TODO: Implement addMileage(double km) - // If km is negative → print error - // Otherwise increase mileage + public double getMileage() { + return mileage; + } - // TODO: Declare abstract method getEnergyType() + public int getYear() { + return year; + } + + public String getModel() { + return model; + } + + public void addMileage(double km) + { + if (km <= 0) + { + System.out.println("An error occurred while adding mileage to the vehicle, value must be bigger than zero, " + km + " is not"); + } + + mileage += km; + } + + public abstract String getEnergyType(); public void basicInfo() { System.out.println( diff --git a/src/main/java/org/util/VehicleInspector.java b/src/main/java/org/util/VehicleInspector.java index c83c420..44b78b1 100644 --- a/src/main/java/org/util/VehicleInspector.java +++ b/src/main/java/org/util/VehicleInspector.java @@ -1,12 +1,8 @@ package org.util; import org.*; -import org.model.Vehicle; - -/* - * Utility class to inspect vehicles. - * Demonstrates instanceof and polymorphism. - */ +import org.behavior.Serviceable; +import org.model.*; public class VehicleInspector { @@ -14,9 +10,20 @@ public class VehicleInspector { v.basicInfo(); - // TODO: - // If ElectricCar → print "Check battery system" - // If SportsCar → print "Check brakes and performance" - // If GasCar → print "Check engine and oil" + if (v instanceof ElectricCar){ + System.out.println("Check battery system"); + } + else if (v instanceof SportsCar){ + System.out.println("Check brakes and performance"); + } + else if (v instanceof GasCar){ + System.out.println("Check engine and oil"); + } + else if (v instanceof HybridCar){ + System.out.println("Check battery system, engine and oil"); + } + else { + System.out.println("This type of vehicle is not supported"); + } } }