src/main/java/org/Main.java

@@ -1,5 +1,9 @@
 package org;
 
+import org.model.*;
+import org.util.VehicleInspector;
+import org.behavior.Serviceable;
+
 public class Main {
     public static void main(String[] args) {
 
@@ -17,8 +21,37 @@ public class Main {
         //          ElectricCar tesla = new ElectricCar(...);
         // ============================================================
 
+        ElectricCar tesla = new ElectricCar(
+                "Tesla",
+                "Model 3",
+                2022,
+                12000,
+                5,
+                75,
+                80
+        );
+
+        GasCar bmw = new GasCar(
+                "BMW",
+                "320i",
+                2018,
+                8500,
+                5,
+                60,
+                "Petrol"
+        );
 
 
+        SportsCar porsche = new SportsCar(
+                "Porsche",
+                "911 Turbo",
+                2021,
+                3000,
+                2,
+                70,
+                "Petrol",
+                2.8
+        );
 
 
         // ============================================================
@@ -31,9 +64,7 @@ public class Main {
         // subclasses (ElectricCar, GasCar, SportsCar) are stored
         // as their parent type (Vehicle).
         // ============================================================
-
-
-
+        Vehicle[] vehicles = { tesla, bmw, porsche };
 
 
         // ============================================================
@@ -46,9 +77,11 @@ public class Main {
         //   Demonstrate that all subclasses share the same Vehicle
         //   behavior and can call inherited methods.
         // ============================================================
-
-
-
+        System.out.println("=== Vehicle Basic Info ===");
+        for (Vehicle v : vehicles) {
+            v.basicInfo();
+            System.out.println();
+        }
 
 
         // ============================================================
@@ -62,8 +95,10 @@ public class Main {
         //   • Show subclass‑specific inspection messages
         // ============================================================
 
-
-
+        System.out.println("=== Vehicle Inspection ===");
+        for (Vehicle v : vehicles) {
+            VehicleInspector.inspect(v);
+        }
 
 
         // ============================================================
@@ -79,8 +114,7 @@ public class Main {
         //           Vehicle v = (Vehicle) s;
         //
         // ============================================================
-
-
+        Serviceable[] serviceables = { tesla, bmw, porsche };
 
 
 
@@ -106,6 +140,24 @@ public class Main {
         // Add blank lines between each item for readability.
         // ============================================================
 
+        System.out.println("=== Service Check ===");
+
+        for (Serviceable s : serviceables) {
+
+            // 1. Cast Serviceable → Vehicle
+            Vehicle v = (Vehicle) s;
+
+            // 2. Check if it needs service
+            if (s.needsService(v)) {
+                System.out.println(v.getBrand() + " " + v.getModel() + " needs service.");
+                s.performService();
+            } else {
+                System.out.println(v.getBrand() + " " + v.getModel() + " does NOT need service.");
+            }
+
+            System.out.println();
+        }
+
 
 
 
@@ -118,8 +170,7 @@ public class Main {
         //
         // ============================================================
 
-
-
+        System.out.println("=== Workshop Completed ===");
 
 
     }

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

@@ -19,6 +19,7 @@ public abstract class Car extends Vehicle implements Serviceable {
                double mileage, int seats) {
 
         // TODO: Call super constructor
+        super(brand, model, year, mileage);
         this.seats = seats;
     }
 
@@ -26,16 +27,36 @@ public abstract class Car extends Vehicle implements Serviceable {
 
     // TODO: Override showDetails()
     // Print brand, model, year, mileage, and number of seats
+    @Override
+    public String getEnergyType()
+    {
+        return "Unknown";
+    }
+
+    @Override
+    public void showDetails()
+    {
+        System.out.println("Brand: " + getBrand());
+        System.out.println("Model: " + getModel());
+        System.out.println("Year: " + getYear());
+        System.out.println("Mileage: " + getMileage());
+        System.out.println("Energy Type: " + getEnergyType());
+        System.out.println("Seats: " + seats);
+    }
+
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return getMileage() > 10000;
+    }
+
+
+    @Override
+    public void performService()
+    {
+        System.out.println("General car service completed");
+    }
+
 
-    /*
-     * 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"
-     */
 }

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

@@ -36,4 +36,49 @@ public class ElectricCar extends Car implements Chargeable {
     // TODO: Implement charge(double amount)
     // Validate negative
     // Cap at 100
+    @Override
+    public String getEnergyType() {
+        return "Electric";
+    }
+
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
+        System.out.println("Battery Capacity: " + batteryCapacity + " kWh");
+        System.out.println("Charge Level: " + chargeLevel + "%");
+    }
+
+    @Override
+    public void charge(double amount)
+    {
+
+        if (amount <= 0)
+        {
+            System.out.println("Invalid charge amount!");
+            return;
+        }
+
+        chargeLevel += amount;
+
+        if (chargeLevel > 100)
+        {
+            chargeLevel = 100;
+        }
+
+        System.out.println("Car charged. Current charge level: " + chargeLevel + "%");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return getMileage() > 8000;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Battery system checked");
+        chargeLevel = 100;
+    }
 }

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

@@ -28,12 +28,52 @@ public class GasCar extends Car implements Refuelable {
     }
 
     // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    @Override
+    public String getEnergyType() {
+        return fuelType + " (Gas)";
+    }
 
     // TODO: Implement refuel(double amount)
+    @Override
+    public void refuel(double amount) {
+        if (amount <= 0) {
+            System.out.println("Invalid refuel amount!");
+            return;
+        }
+
+        fuelLevel += amount;
+
+        if (fuelLevel > 100) {
+            fuelLevel = 100; // cap at 100
+        }
+
+        System.out.println("Car refueled. Current fuel level: " + fuelLevel);
+    }
     // Validate amount
     // Cap at 100
 
     // TODO: Override showDetails()
     // Call super.showDetails()
     // Print fuel level and fuel type
+    @Override
+    public void showDetails()
+    {
+        super.showDetails();
+        System.out.println("Fuel Type: " + fuelType);
+        System.out.println("Fuel Level: " + fuelLevel + "%");
+    }
+
+
+    @Override
+    public boolean needsService(Vehicle v)
+    {
+        return getMileage() > 12000;
+    }
+
+    @Override
+    public void performService()
+    {
+        System.out.println("Engine oil changed");
+        fuelLevel = 100;
+    }
 }

src/main/java/org/model/SportsCar.java

@@ -23,6 +23,11 @@ public class SportsCar extends GasCar {
 
         this.zeroToHundred = zeroToHundred;
     }
+    @Override
+    public void showDetails() {
+        super.showDetails();
+        System.out.println("0-100 Acceleration: " + zeroToHundred + " seconds");
+    }
 
     // TODO: Override showDetails()
     // Call super.showDetails()

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

@@ -21,12 +21,41 @@ public abstract class Vehicle {
     }
 
     // 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)
     // If km is negative → print error
     // Otherwise increase mileage
+    public void addMileage(double km)
+    {
+        if (km < 0)
+        {
+            System.err.println("Error: Mileage cannot be negative.");
+        } else {
+            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

@@ -1,7 +1,10 @@
 package org.util;
 
-import org.*;
 import org.model.Vehicle;
+import org.model.ElectricCar;
+import org.model.SportsCar;
+import org.model.GasCar;
+
 
 /*
  * Utility class to inspect vehicles.
@@ -14,9 +17,21 @@ 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");
+        }
+
+        System.out.println("---------------------------");
+
+
     }
 }