Implemented all of the TODO sections, Added HybridCar class and its methods, removed comments.

src/main/java/org/Main.java

@@ -1,125 +1,47 @@
 package org;
 
+import org.behavior.Serviceable;
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
+import org.model.Vehicle;
+import org.util.VehicleInspector;
+
 public class Main {
     public static void main(String[] args) {
 
-        // ============================================================
+        ElectricCar tesla = new ElectricCar("Tesla","Model Y",2020,120.8,4,42000,25);
-        // TODO 1:
+        GasCar bmw = new GasCar("BMW","M5",2025,2120,4,40,"Gasoline");
-        // Create one instance of each vehicle type:
+        SportsCar koenigsegg = new SportsCar("Koenigsegg","Jesko",2023,12,2,50,"Gasoline",2.3);
-        //    - 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(...);
-        // ============================================================
 
+        Vehicle[] vehicles = {tesla,bmw,koenigsegg};
 
+        for (Vehicle v : vehicles){
+            v.basicInfo();
+            System.out.println("-------------------------------");
+        }
 
+        for (Vehicle v : vehicles){
+            VehicleInspector.inspect(v);
+        }
 
+        Serviceable[] serviceables = {tesla,bmw,koenigsegg};
 
-        // ============================================================
+        for (Serviceable s : serviceables){
-        // TODO 2:
+            Vehicle v = (Vehicle) s;
-        // 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 ===");
-        //
-        // ============================================================
-
 
+            if (s.needsService(v)){
+                System.out.println("Brand : " + v.getBrand());
+                System.out.println("Model : " + v.getModel() );
+                s.performService();
+            }
+            else {
+                System.out.println("The car does not need service");
+            }
+            System.out.println("-------------------------------");
+        }
 
+        System.out.println("=== Workshop Completed ===");
 
 
     }

src/main/java/org/model/Car.java

@@ -1,14 +1,5 @@
 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 {
@@ -18,23 +9,32 @@ public abstract class Car extends Vehicle implements Serviceable {
     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()
 
-    /*
+    @Override
-     * Implement Serviceable methods:
+    public void showDetails() {
-     *
+        System.out.println("Seats Count : " + this.seats);
-     * needsService(Vehicle v):
+    }
-     * - Check the mileage of the current car
+
-     * - If mileage > 10000 return true
+    @Override
-     * - Otherwise return false
+    public boolean needsService(Vehicle v) {
-     *
+        if (v.getMileage() > 10000){
-     * performService():
+            return true;
-     * - Print: "General car service completed"
+        }
-     */
+        return false;
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("General car service completed");
+    }
+
 }

src/main/java/org/model/ElectricCar.java

@@ -1,16 +1,5 @@
 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 {
@@ -27,11 +16,39 @@ public class ElectricCar extends Car implements Chargeable {
         this.chargeLevel = chargeLevel;
     }
 
-    // TODO: Override getEnergyType() → return "Electric"
+    @Override
+    public String getEnergyType() {
+        return "Electric";
+    }
 
-    // TODO: Override showDetails()
+    @Override
+    public void showDetails() {
+        System.out.println("Battery capacity : " + this.batteryCapacity);
+        System.out.println("Charge level : " + this.chargeLevel);
+    }
 
-    // TODO: Implement charge(double amount)
+    public void charge(double amount){
-    // Validate negative
+        if (amount <= 0){
-    // Cap at 100
+            System.out.println("Charging amount should be positive.");
+            return;
+        }
+        if (chargeLevel + amount > 100){
+            System.out.println("Battery Full!");
+            return;
+        }
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 8000){
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Battery system checked");
+        this.chargeLevel = 100;
+    }
 }

src/main/java/org/model/GasCar.java

@@ -1,16 +1,5 @@
 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 {
@@ -27,11 +16,39 @@ public class GasCar extends Car implements Refuelable {
         this.fuelType = fuelType;
     }
 
-    // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    @Override
+    public String getEnergyType() {
+        return this.fuelType + " (Gas)";
+    }
 
-    // TODO: Implement refuel(double amount)
+    public void refuel(double amount){
-    // Validate amount
+        if (amount <= 0){
-    // Cap at 100
+            System.out.println("Amount of fuel should be positive");
+            return;
+        }
+        if (this.fuelLevel + amount > 100){
+            System.out.println("Out of storage!");
+            return;
+        }
+    }
 
-    // TODO: Override showDetails()
+    @Override
+    public void showDetails() {
+        System.out.println("Fuel Level : " + this.fuelLevel);
+        System.out.println("Fuel Type : " + this.fuelType);
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 12000){
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Engine oil changed.");
+        this.fuelLevel = 100;
+    }
 }

src/main/java/org/model/HybridCar.java

@@ -0,0 +1,43 @@
+package org.model;
+import org.behavior.Chargeable;
+import org.behavior.Refuelable;
+
+public class HybridCar extends Car implements Refuelable, Chargeable{
+    private int batteryCapacity;
+    private double chargeLevel;
+    private double fuelLevel;
+
+    public HybridCar(String brand, String model, int year,
+                     double mileage, int seats,
+                     int batteryCapacity, double chargeLevel, double fuelLevel){
+        super(brand, model, year, mileage, seats);
+        this.batteryCapacity = batteryCapacity;
+        this.chargeLevel = chargeLevel;
+        this.fuelLevel = fuelLevel;
+    }
+
+    @Override
+    public void charge(double amount){
+        if (amount <= 0){
+            System.out.println("Charging amount should be positive.");
+            return;
+        }
+        if (chargeLevel + amount > 100){
+            System.out.println("Battery Full!");
+            return;
+        }
+    }
+
+    @Override
+    public void refuel(double amount){
+        if (amount <= 0){
+            System.out.println("Amount of fuel should be positive");
+            return;
+        }
+        if (this.fuelLevel + amount > 100){
+            System.out.println("Out of storage!");
+            return;
+        }
+    }
+
+}

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;
@@ -24,8 +15,23 @@ public class SportsCar extends GasCar {
         this.zeroToHundred = zeroToHundred;
     }
 
-    // TODO: Override showDetails()
+    @Override
-    // Print header
+    public void showDetails() {
-    // Call super.showDetails()
+        System.out.println("===SportsCar===");
-    // Print acceleration time
+        super.showDetails();
+        System.out.println("0-100 acceleration time : " + this.zeroToHundred);
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 5000){
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("High-performance brake system checked");
+    }
 }

src/main/java/org/model/Vehicle.java

@@ -1,11 +1,5 @@
 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;
@@ -20,13 +14,29 @@ public abstract class Vehicle {
         this.mileage = mileage;
     }
 
-    // TODO: Create getters for all fields
+    public String getBrand() {
+        return brand;
+    }
+    public String getModel() {
+        return model;
+    }
+    public int getYear(){
+        return year;
+    }
+    public double getMileage(){
+        return mileage;
+    }
 
-    // TODO: Implement addMileage(double km)
+    public void addMileage(double km){
-    // If km is negative → print error
+        if (km <= 0){
-    // Otherwise increase mileage
+            System.out.println("Error!, mileage can't be negative");
+            return;
+        }
+        this.mileage += km;
+    }
 
-    // TODO: Declare abstract method getEnergyType()
+
+    public abstract String getEnergyType();
 
     public void basicInfo() {
         System.out.println(

src/main/java/org/util/VehicleInspector.java

@@ -1,6 +1,9 @@
 package org.util;
 
 import org.*;
+import org.model.ElectricCar;
+import org.model.GasCar;
+import org.model.SportsCar;
 import org.model.Vehicle;
 
 /*
@@ -14,9 +17,12 @@ public class VehicleInspector {
 
         v.basicInfo();
 
-        // TODO:
+        if (v instanceof ElectricCar){
-        // If ElectricCar → print "Check battery system"
+            System.out.println("Check battery system");
-        // If SportsCar → print "Check brakes and performance"
+        } else if (v instanceof GasCar) {
-        // If GasCar → print "Check engine and oil"
+            System.out.println("Check engine and oil");
+        } else if (v instanceof SportsCar) {
+            System.out.println("Check brakes and performance");
+        }
     }
 }