src/main/java/org/Main.java

@@ -1,5 +1,12 @@
 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) {
 
@@ -18,6 +25,12 @@ public class Main {
         // ============================================================
 
 
+        ElectricCar tesla = new ElectricCar("Tesla", "Model S", 2022, 1000, 100, 550, 50);
+
+        GasCar toyota = new GasCar("Toyota", "Corolla", 2018, 85000, 5, 50, "Petrol");
+
+        SportsCar ferrari = new SportsCar("Ferrari", "F8 Tributo", 2021, 12000, 2, 3.9, "oil", 710);
+
 
 
 
@@ -32,6 +45,8 @@ public class Main {
         // as their parent type (Vehicle).
         // ============================================================
 
+        Vehicle[] vehicles = {tesla, toyota, ferrari};
+
 
 
 
@@ -47,7 +62,11 @@ public class Main {
         //   behavior and can call inherited methods.
         // ============================================================
 
-
+        for (Vehicle v : vehicles) {
+            System.out.println();
+            v.basicInfo();
+            System.out.println();
+        }
 
 
 
@@ -62,6 +81,10 @@ public class Main {
         //   • Show subclass‑specific inspection messages
         // ============================================================
 
+        VehicleInspector.inspect(tesla);
+        VehicleInspector.inspect(toyota);
+        VehicleInspector.inspect(ferrari);
+
 
 
 
@@ -80,6 +103,7 @@ public class Main {
         //
         // ============================================================
 
+        Serviceable[] serviceables = {tesla, toyota, ferrari};
 
 
 
@@ -106,6 +130,18 @@ public class Main {
         // Add blank lines between each item for readability.
         // ============================================================
 
+        for (Serviceable s : serviceables) {
+            Vehicle v = (Vehicle) s;
+
+            if (s.needsService(v)) {
+                System.out.println("brand: " + v.getBrand() + "\nmodel: " + v.getModel());
+                s.performService();
+            }
+            else {
+                System.out.println("the car does not need service!");
+            }
+            System.out.println();
+        }
 
 
 
@@ -118,6 +154,7 @@ public class Main {
         //
         // ============================================================
 
+        System.out.println("=== Workshop Completed ===");
 
 
 

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

@@ -15,17 +15,27 @@ public abstract class Car extends Vehicle implements Serviceable {
 
     private int seats;
 
-    public Car(String brand, String model, int year,
-               double mileage, 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"
+    public String getEnergyType() { return "Unknown";}
 
     // TODO: Override showDetails()
     // Print brand, model, year, mileage, and number of seats
+    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("number of sets: " + seats);
+
+    }
 
     /*
      * Implement Serviceable methods:
@@ -38,4 +48,16 @@ public abstract class Car extends Vehicle implements Serviceable {
      * performService():
      * - Print: "General car service completed"
      */
+
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 10000) {
+            return true;
+        }
+        else { return false; }
+
+    }
+
+    public void performService() {
+        System.out.println("General car service completed.");
+    }
 }

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

@@ -29,11 +29,50 @@ public class ElectricCar extends Car implements Chargeable {
 
     // 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();
+        System.out.println("battery capacity: " + batteryCapacity);
+        System.out.println("charge level: " + chargeLevel);
+    }
+
+
     // TODO: Implement charge(double amount)
     // Validate negative
     // Cap at 100
+    public void charge(double amount) {
+        if (amount <= 0) {
+            System.out.println("error");
+        }
+        else if ((chargeLevel + amount) <= 100 ) {
+            chargeLevel += amount;
+        }
+        else {
+            chargeLevel = amount;
+        }
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (v.getMileage() > 8000) {
+            return true;
+        }
+        else { return false; }
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Battery system checked.");
+    }
+
 }

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

@@ -28,12 +28,47 @@ public class GasCar extends Car implements Refuelable {
     }
 
     // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    public String getEnergyType() { return fuelType + " (Gas)"; }
 
     // TODO: Implement refuel(double amount)
     // Validate amount
     // Cap at 100
+    public void refuel(double amount) {
+        if (amount <= 0) {
+            System.out.println("error");
+        }
+        else if ((fuelLevel + amount) <= 100 ) {
+            fuelLevel += amount;
+        }
+        else {
+            fuelLevel = amount;
+        }
+
+    }
 
     // TODO: Override showDetails()
     // Call super.showDetails()
     // Print fuel level and fuel type
+
+    @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 (v.getMileage() > 12000) {
+            return true;
+        }
+        else { return false; }
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Engine oil changed.");
+    }
+
+
 }

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

@@ -27,4 +27,25 @@ public class SportsCar extends GasCar {
     // 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) {
+        if (v.getMileage() > 5000) {
+            return true;
+        }
+        else { return false; }
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("High-performance brake system checked.");
+    }
+
 }

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

@@ -21,14 +21,29 @@ 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.out.println("error");
+        }
+        else {
+            mileage++;
+        }
+    }
 
     // TODO: Declare abstract method getEnergyType()
+    public abstract String getEnergyType();
+
 
     public void basicInfo() {
+        System.out.println();
         System.out.println(
                 year + " " + brand + " " + model +
                         " | Mileage: " + mileage +

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

@@ -1,7 +1,7 @@
 package org.util;
 
 import org.*;
-import org.model.Vehicle;
+import org.model.*;
 
 /*
  * Utility class to inspect vehicles.
@@ -18,5 +18,15 @@ public class VehicleInspector {
         // 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.");
+        }
+        if (v instanceof SportsCar) {
+            System.out.println("Check brakes and performance.");
+        }
+        if (v instanceof GasCar) {
+            System.out.println("Check engine and oil.");
+        }
     }
 }