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d6cae281d9 | ||
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2de716271c |
+51
-114
@@ -1,126 +1,63 @@
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package org;
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package org;
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public class Main {
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import org.behavior.Serviceable;
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public static void main(String[] args) {
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import org.model.ElectricCar;
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import org.model.GasCar;
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import org.model.SportsCar;
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import org.model.Vehicle;
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import org.util.VehicleInspector;
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// ============================================================
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public class Main
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// TODO 1:
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{
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// Create one instance of each vehicle type:
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public static void main(String[] args)
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// - ElectricCar
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{
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// - GasCar
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ElectricCar tesla = new ElectricCar("Tesla", "Model S", 2022, 1000,
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// - SportsCar
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100, 550, 50);
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//
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// Requirements:
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GasCar toyota = new GasCar("Toyota", "Corolla", 2018, 85000,
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// • Use the constructors you created in each class.
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5, 50, "Petrol");
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// • Provide realistic values (brand, model, year, mileage, etc.).
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// • Store them in variables such as:
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SportsCar ferrari = new SportsCar("Ferrari", "F8 Tributo", 2021, 12000,
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// ElectricCar tesla = new ElectricCar(...);
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2, 3.9, "oil", 710);
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// ============================================================
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Vehicle[] vehicles = {tesla, toyota, ferrari};
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System.out.println();
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for (Vehicle v : vehicles)
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{
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v.basicInfo();
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System.out.println("----------------------------------------------------------------");
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}
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System.out.println();
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System.out.println("==================================================================");
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System.out.println();
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for (Vehicle v : vehicles)
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{
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VehicleInspector.inspect(v);
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System.out.println("----------------------------------------------------------------");
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}
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System.out.println();
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System.out.println("==================================================================");
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// ============================================================
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Serviceable[] serviceables = {(Serviceable) tesla, (Serviceable) toyota, (Serviceable) ferrari};
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// TODO 2:
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// Create an array of Vehicle:
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// Vehicle[] vehicles = { ... };
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//
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// This array MUST contain the objects created above.
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// This demonstrates **polymorphism** because all different
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// subclasses (ElectricCar, GasCar, SportsCar) are stored
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// as their parent type (Vehicle).
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// ============================================================
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// ============================================================
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// TODO 3:
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// Loop through the Vehicle[] array and:
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// • Call v.basicInfo();
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// • Print a blank line after each.
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//
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// Purpose:
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// Demonstrate that all subclasses share the same Vehicle
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// behavior and can call inherited methods.
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// ============================================================
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// ============================================================
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// TODO 4:
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// Use VehicleInspector to inspect each vehicle:
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//
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// VehicleInspector.inspect(v);
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//
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// Purpose:
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// • Demonstrate the use of `instanceof`
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// • Show subclass‑specific inspection messages
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// ============================================================
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// ============================================================
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// TODO 5:
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// Create an array of Serviceable:
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// Serviceable[] serviceables = { ... };
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//
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// This demonstrates **interface‑based polymorphism**.
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// Every Car subtype implements Serviceable.
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//
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// IMPORTANT:
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// • You must cast to Vehicle when needed:
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// Vehicle v = (Vehicle) s;
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//
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// ============================================================
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// ============================================================
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// TODO 6:
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// Loop through the Serviceable[] array:
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//
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// Steps inside loop:
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//
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// 1. Cast the current object to Vehicle:
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// Vehicle v = (Vehicle) s;
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//
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// 2. Check:
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// if (s.needsService(v)) { ... }
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//
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// 3. If true:
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// - Print a message showing brand + model
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// - Call s.performService();
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//
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// 4. Otherwise:
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// - Print that the car does not need service
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//
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// Add blank lines between each item for readability.
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// ============================================================
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// ============================================================
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// TODO 7 (Optional):
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// After everything is done, print a final message:
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//
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// System.out.println("=== Workshop Completed ===");
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//
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// ============================================================
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for (Serviceable s : serviceables)
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{
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Vehicle v = (Vehicle) s;
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if (s.needsService(v))
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{
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System.out.println(v.getBrand() + " " + v.getModel());
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s.performService();
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}
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else
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{
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System.out.println(v.getBrand() + " " + v.getModel() + " does not need service");
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}
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System.out.println("----------------------------------------------------------------");
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}
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System.out.println("=== Workshop Completed ===");
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}
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}
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}
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}
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@@ -11,22 +11,31 @@ package org.model;
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import org.behavior.Serviceable;
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import org.behavior.Serviceable;
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public abstract class Car extends Vehicle implements Serviceable {
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public abstract class Car extends Vehicle implements Serviceable
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{
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private int seats;
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private int seats;
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public Car(String brand, String model, int year,
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public Car(String brand, String model, int year, double mileage, int seats)
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double mileage, int seats) {
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{
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super(brand, model, year, mileage);
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// TODO: Call super constructor
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this.seats = seats;
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this.seats = seats;
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}
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}
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// TODO: Override getEnergyType() → return "Unknown"
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@Override
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public String getEnergyType() { return "Unknown"; }
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// TODO: Override showDetails()
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// Print brand, model, year, mileage, and number of seats
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@Override
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public void showDetails()
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{
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System.out.println("==========================");
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System.out.println("Brand : " + getBrand());
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System.out.println("Model : " + getModel());
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System.out.println("Year : " + getYear());
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System.out.println("Mileage : " + getMileage());
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System.out.println("Number of seats : " + seats);
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System.out.println("==========================");
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}
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/*
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/*
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* Implement Serviceable methods:
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* Implement Serviceable methods:
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*
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*
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@@ -38,4 +47,16 @@ public abstract class Car extends Vehicle implements Serviceable {
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* performService():
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* performService():
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* - Print: "General car service completed"
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* - Print: "General car service completed"
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*/
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*/
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@Override
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public boolean needsService(Vehicle v)
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{
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if (getMileage() > 1000 ) return true;
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return false;
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}
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@Override
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public void performService()
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{
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System.out.println("Gneral car service completed");
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}
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}
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}
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@@ -13,27 +13,59 @@ package org.model;
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import org.behavior.Chargeable;
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import org.behavior.Chargeable;
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public class ElectricCar extends Car implements Chargeable {
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public class ElectricCar extends Car implements Chargeable
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{
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private int batteryCapacity;
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private int batteryCapacity;
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private double chargeLevel;
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private double chargeLevel;
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public ElectricCar(String brand, String model, int year,
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public ElectricCar(String brand, String model, int year, double mileage, int seats, int batteryCapacity, double chargeLevel)
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double mileage, int seats,
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{
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int batteryCapacity, double chargeLevel) {
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super(brand, model, year, mileage, seats);
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super(brand, model, year, mileage, seats);
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this.batteryCapacity = batteryCapacity;
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this.batteryCapacity = batteryCapacity;
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this.chargeLevel = chargeLevel;
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this.chargeLevel = chargeLevel;
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}
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}
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// TODO: Override getEnergyType() → return "Electric"
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@Override
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public String getEnergyType() { return "Electric";}
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// TODO: Override showDetails()
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@Override
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// Call super.showDetails()
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public void showDetails()
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// Print battery capacity and charge level
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{
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super.showDetails();
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System.out.println("The Capacity of the battery : " + batteryCapacity);
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System.out.println("The charge level : " + chargeLevel);
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}
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// TODO: Implement charge(double amount)
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@Override
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// Validate negative
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public void charge(double amount)
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// Cap at 100
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{
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if (amount < 0)
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{
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System.out.println("Error !");
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return;
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}
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chargeLevel += amount;
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if (chargeLevel > 100)
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{
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chargeLevel = 100;
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System.out.println("Full !");
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}
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}
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@Override
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public boolean needsService(Vehicle v)
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|
{
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|
if ( getMileage() > 8000) return true;
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|
return false;
|
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|
}
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|
@Override
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|
public void performService()
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|
{
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|
System.out.println("Battery system checked");
|
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|
this.chargeLevel = 100;
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|
System.out.println("Charge level reset to 100%");
|
||||||
|
}
|
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}
|
}
|
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|
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@@ -13,27 +13,59 @@ package org.model;
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|
|
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import org.behavior.Refuelable;
|
import org.behavior.Refuelable;
|
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|
|
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public class GasCar extends Car implements Refuelable {
|
public class GasCar extends Car implements Refuelable
|
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|
{
|
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private double fuelLevel;
|
private double fuelLevel;
|
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private String fuelType;
|
private String fuelType;
|
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|
|
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public GasCar(String brand, String model, int year,
|
public GasCar(String brand, String model, int year, double mileage, int seats, double fuelLevel, String fuelType)
|
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double mileage, int seats,
|
{
|
||||||
double fuelLevel, String fuelType) {
|
|
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|
|
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super(brand, model, year, mileage, seats);
|
super(brand, model, year, mileage, seats);
|
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this.fuelLevel = fuelLevel;
|
this.fuelLevel = fuelLevel;
|
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this.fuelType = fuelType;
|
this.fuelType = fuelType;
|
||||||
}
|
}
|
||||||
|
|
||||||
// TODO: Override getEnergyType() → return fuelType + " (Gas)"
|
@Override
|
||||||
|
public String getEnergyType() { return fuelType + "Gas"; }
|
||||||
|
|
||||||
// TODO: Implement refuel(double amount)
|
@Override
|
||||||
// Validate amount
|
public void refuel(double amount)
|
||||||
// Cap at 100
|
{
|
||||||
|
if (amount < 0)
|
||||||
|
{
|
||||||
|
System.out.println("Error");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
// TODO: Override showDetails()
|
fuelLevel += amount;
|
||||||
// Call super.showDetails()
|
if (fuelLevel > 100)
|
||||||
// Print fuel level and fuel type
|
{
|
||||||
|
fuelLevel = 100;
|
||||||
|
System.out.println("Full !");
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void showDetails()
|
||||||
|
{
|
||||||
|
super.showDetails();
|
||||||
|
System.out.println("Fuel level : " + fuelLevel);
|
||||||
|
System.out.println("Fuel type : " + fuelType);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean needsService(Vehicle v)
|
||||||
|
{
|
||||||
|
if (getMileage() > 12000) return true;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void performService()
|
||||||
|
{
|
||||||
|
System.out.println("Engine oil changed");
|
||||||
|
this.fuelLevel = 100;
|
||||||
|
System.out.println("Fuel level reset to 100");
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
@@ -24,7 +24,20 @@ public class SportsCar extends GasCar {
|
|||||||
this.zeroToHundred = zeroToHundred;
|
this.zeroToHundred = zeroToHundred;
|
||||||
}
|
}
|
||||||
|
|
||||||
// TODO: Override showDetails()
|
@Override
|
||||||
// Call super.showDetails()
|
public void showDetails()
|
||||||
// Print acceleration time
|
{
|
||||||
|
super.showDetails();
|
||||||
|
System.out.println("Acceleration time : " + zeroToHundred);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public boolean needsService(Vehicle v)
|
||||||
|
{
|
||||||
|
if (getMileage() > 5000) return true;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Override
|
||||||
|
public void performService() { System.out.println("High-performance brake system checked"); }
|
||||||
}
|
}
|
||||||
|
|||||||
@@ -20,13 +20,21 @@ public abstract class Vehicle {
|
|||||||
this.mileage = mileage;
|
this.mileage = mileage;
|
||||||
}
|
}
|
||||||
|
|
||||||
// TODO: Create getters for all fields
|
public String getBrand() { return brand; }
|
||||||
|
|
||||||
// TODO: Implement addMileage(double km)
|
public String getModel() { return model; }
|
||||||
// If km is negative → print error
|
|
||||||
// Otherwise increase mileage
|
|
||||||
|
|
||||||
// TODO: Declare abstract method getEnergyType()
|
public int getYear() { return year; }
|
||||||
|
|
||||||
|
public double getMileage() { return mileage; }
|
||||||
|
|
||||||
|
public void addMileage(double km)
|
||||||
|
{
|
||||||
|
if (km < 0) System.out.println("Error !");
|
||||||
|
else this.mileage += km;
|
||||||
|
}
|
||||||
|
|
||||||
|
public abstract String getEnergyType();
|
||||||
|
|
||||||
public void basicInfo() {
|
public void basicInfo() {
|
||||||
System.out.println(
|
System.out.println(
|
||||||
|
|||||||
@@ -1,6 +1,9 @@
|
|||||||
package org.util;
|
package org.util;
|
||||||
|
|
||||||
import org.*;
|
import org.*;
|
||||||
|
import org.model.ElectricCar;
|
||||||
|
import org.model.GasCar;
|
||||||
|
import org.model.SportsCar;
|
||||||
import org.model.Vehicle;
|
import org.model.Vehicle;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
@@ -8,15 +11,14 @@ import org.model.Vehicle;
|
|||||||
* Demonstrates instanceof and polymorphism.
|
* Demonstrates instanceof and polymorphism.
|
||||||
*/
|
*/
|
||||||
|
|
||||||
public class VehicleInspector {
|
public class VehicleInspector
|
||||||
|
{
|
||||||
public static void inspect(Vehicle v) {
|
public static void inspect(Vehicle v)
|
||||||
|
{
|
||||||
v.basicInfo();
|
v.basicInfo();
|
||||||
|
|
||||||
// TODO:
|
if (v instanceof ElectricCar) System.out.println("Check battery system");
|
||||||
// If ElectricCar → print "Check battery system"
|
else if (v instanceof SportsCar) System.out.println("Check brakes and performance");
|
||||||
// If SportsCar → print "Check brakes and performance"
|
else if (v instanceof GasCar) System.out.println("Check engine and oil");
|
||||||
// If GasCar → print "Check engine and oil"
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user