Workshop-3

src/main/java/org/Main.java

@@ -1,20 +1,20 @@
 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, 85000, 5, 550, 50);
+
+        GasCar hyundai = new GasCar("Hyundai", "Sonata", 2014, 18000, 5, 80, "Super Petrol");
+
+        SportsCar bugatti = new SportsCar("Bugatti", "Chiron", 2026, 1000, 2, 60, "Premium", 2.4);
+
+        HybridCar bmw = new HybridCar("BMW", "I8", 2018, 12000, 5, 40, 80);
         // ============================================================
 
 
@@ -22,14 +22,7 @@ public class Main {
 
 
         // ============================================================
-        // 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).
+        Vehicle[] vehicles = {tesla, hyundai, bugatti, bmw};
         // ============================================================
 
 
@@ -37,14 +30,13 @@ public class Main {
 
 
         // ============================================================
-        // 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.
+        System.out.println();
+        System.out.println("--- Basic Vehicle Information ---");
+        for (int i = 0; i < vehicles.length; i++) {
+            Vehicle v = vehicles[i];
+            v.basicInfo();
+            System.out.println();
+        }
         // ============================================================
 
 
@@ -52,14 +44,12 @@ public class Main {
 
 
         // ============================================================
-        // TODO 4:
-        // Use VehicleInspector to inspect each vehicle:
-        //
-        //     VehicleInspector.inspect(v);
-        //
-        // Purpose:
-        //   • Demonstrate the use of `instanceof`
-        //   • Show subclass‑specific inspection messages
+        System.out.println("--- Detailed Inspection ---");
+        for (int i = 0; i < vehicles.length; i++) {
+            Vehicle v = vehicles[i];
+            VehicleInspector.inspect(v);
+            System.out.println();
+        }
         // ============================================================
 
 
@@ -67,17 +57,7 @@ public class Main {
 
 
         // ============================================================
-        // 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;
-        //
+        Serviceable[] serviceables = {tesla, hyundai, bugatti, bmw};
         // ============================================================
 
 
@@ -85,25 +65,19 @@ public class Main {
 
 
         // ============================================================
-        // 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.
+        System.out.println("--- Service Result ---");
+        for (int i = 0; i < serviceables.length; i++) {
+            Serviceable s = serviceables[i];
+            Vehicle v = (Vehicle) s;
+
+            if (s.needsService(v)) {
+                System.out.println("SERVICE REQUIRED for: " + v.getBrand() + " " + v.getModel());
+                s.performService();
+            } else {
+                System.out.println("No service needed for: " + v.getBrand() + " " + v.getModel());
+            }
+            System.out.println();
+        }
         // ============================================================
 
 
@@ -111,11 +85,7 @@ public class Main {
 
 
         // ============================================================
-        // TODO 7 (Optional):
-        // After everything is done, print a final message:
-        //
-        //   System.out.println("=== Workshop Completed ===");
-        //
+        System.out.println("=== Workshop Completed ===");
         // ============================================================
 
 

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

@@ -15,17 +15,21 @@ 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"
+    @Override
+    public String getEnergyType() {
+        return "Unknown";
+    }
 
-    // TODO: Override showDetails()
-    // Print brand, model, year, mileage, and number of seats
+    @Override
+    public void showDetails() {
+        System.out.println("Brand: " + getBrand() + ", Model: " + getModel() + ", Year: " + getYear() + ", Mileage: " + getMileage() + ", Seats: " + seats);
+    }
 
     /*
      * Implement Serviceable methods:
@@ -38,4 +42,15 @@ public abstract class Car extends Vehicle implements Serviceable {
      * performService():
      * - Print: "General car service completed"
      */
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (this.getMileage() > 10000) {return true;}
+        else {return false;}
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("General car service completed");
+    }
 }

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

@@ -18,22 +18,44 @@ public class ElectricCar extends Car implements Chargeable {
     private int batteryCapacity;
     private double chargeLevel;
 
-    public ElectricCar(String brand, String model, int year,
-                       double mileage, int seats,
-                       int batteryCapacity, double chargeLevel) {
+    public ElectricCar(String brand, String model, int year, double mileage, int seats, int batteryCapacity, double chargeLevel) {
 
         super(brand, model, year, mileage, seats);
         this.batteryCapacity = batteryCapacity;
         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();
+        System.out.println("Battery Capacity: " + batteryCapacity + " kWh, Charge Level: " + chargeLevel + "%");
+    }
 
-    // TODO: Implement charge(double amount)
-    // Validate negative
-    // Cap at 100
+    @Override
+    public void charge(double amount) {
+        if (amount < 0) {
+            System.out.println("Invalid charge amount.");
+            return;
+        }
+        this.chargeLevel += amount;
+        if (this.chargeLevel > 100) {
+            this.chargeLevel = 100;
+        }
+    }
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (this.getMileage() > 8000) {return true;}
+        else {return false;}
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Battery system checked");
+        this.chargeLevel = 100;
+    }
 }

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

@@ -18,22 +18,44 @@ public class GasCar extends Car implements Refuelable {
     private double fuelLevel;
     private String fuelType;
 
-    public GasCar(String brand, String model, int year,
-                  double mileage, int seats,
-                  double fuelLevel, String fuelType) {
+    public GasCar(String brand, String model, int year, double mileage, int seats, double fuelLevel, String fuelType) {
 
         super(brand, model, year, mileage, seats);
         this.fuelLevel = fuelLevel;
         this.fuelType = fuelType;
     }
 
-    // TODO: Override getEnergyType() → return fuelType + " (Gas)"
+    @Override
+    public String getEnergyType() {
+        return fuelType;
+    }
 
-    // TODO: Implement refuel(double amount)
-    // Validate amount
-    // Cap at 100
+    @Override
+    public void refuel(double amount) {
+        if (amount <= 0) {
+            System.out.println("Invalid fuel amount.");
+            return;
+        }
+        this.fuelLevel += amount;
+        if (this.fuelLevel > 100) {
+            this.fuelLevel = 100;
+        }
+    }
 
-    // TODO: Override showDetails()
-    // Call super.showDetails()
-    // Print fuel level and fuel type
+    @Override
+    public void showDetails() {
+        super.showDetails();
+        System.out.println("Fuel Level: " + fuelLevel + "%, Fuel Type: " + fuelType);
+    }
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (this.getMileage() > 12000) {return true;}
+        else {return false;}
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Engine oil changed");
+        this.fuelLevel = 100;
+    }
 }

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

@@ -0,0 +1,65 @@
+package org.model;
+
+import org.behavior.Chargeable;
+import org.behavior.Refuelable;
+
+public class HybridCar extends Car implements Refuelable, Chargeable {
+
+    private double fuelLevel;
+    private double chargeLevel;
+
+    public HybridCar(String brand, String model, int year, double mileage, int seats, double fuelLevel, double chargeLevel) {
+
+        super(brand, model, year, mileage, seats);
+        this.fuelLevel = fuelLevel;
+        this.chargeLevel = chargeLevel;
+    }
+
+    @Override
+    public String getEnergyType() {
+        return "Hybrid (Gas/Electric)";
+    }
+
+    @Override
+    public void refuel(double amount) {
+        if (amount <= 0) {
+            System.out.println("Invalid fuel amount.");
+            return;
+        }
+        this.fuelLevel += amount;
+        if (this.fuelLevel > 100) {
+            this.fuelLevel = 100;
+        }
+    }
+
+    @Override
+    public void charge(double amount) {
+        if (amount <= 0) {
+            System.out.println("Invalid charge amount.");
+            return;
+        }
+        this.chargeLevel += amount;
+        if (this.chargeLevel > 100) {
+            this.chargeLevel = 100;
+        }
+    }
+
+    @Override
+    public void showDetails() {
+        super.showDetails();
+        System.out.println("Fuel Level: " + fuelLevel + "%, Charge Level: " + chargeLevel + "%");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (this.getMileage() > 10000) {return true;}
+        else {return false;}
+    }
+
+    @Override
+    public void performService() {
+        System.out.println("Engine oil changed and battery system checked");
+        this.fuelLevel = 100;
+        this.chargeLevel = 100;
+    }
+}

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

@@ -13,18 +13,27 @@ public class SportsCar extends GasCar {
 
     private double zeroToHundred;
 
-    public SportsCar(String brand, String model, int year,
-                     double mileage, int seats,
-                     double fuelLevel, String fuelType,
-                     double zeroToHundred) {
+    public SportsCar(String brand, String model, int year, double mileage, int seats, double fuelLevel, String fuelType, double zeroToHundred) {
 
-        super(brand, model, year, mileage, seats,
-                fuelLevel, fuelType);
+        super(brand, model, year, mileage, seats, fuelLevel, fuelType);
 
         this.zeroToHundred = zeroToHundred;
     }
 
-    // TODO: Override showDetails()
-    // Call super.showDetails()
-    // Print acceleration time
+    @Override
+    public void showDetails() {
+        super.showDetails();
+        System.out.println("0-100 km/h Acceleration: " + zeroToHundred + "s");
+    }
+
+    @Override
+    public boolean needsService(Vehicle v) {
+        if (this.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

@@ -20,20 +20,23 @@ 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)
-    // If km is negative → print error
-    // Otherwise increase mileage
+    public void addMileage(double km) {
+        if (km < 0) {
+            System.out.println("Error: Cannot add negative mileage.");
+        } else {
+            this.mileage += km;
+        }
+    }
 
-    // TODO: Declare abstract method getEnergyType()
+    public abstract String getEnergyType();
 
     public void basicInfo() {
-        System.out.println(
-                year + " " + brand + " " + model +
-                        " | Mileage: " + mileage +
-                        " | Energy: " + getEnergyType()
-        );
+        System.out.println(brand + " " + model + " " + year + " | Mileage: " + mileage + " | Energy: " + getEnergyType());
     }
 
     public abstract void showDetails();

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

@@ -1,6 +1,6 @@
 package org.util;
 
-import org.*;
+import org.model.*;
 import org.model.Vehicle;
 
 /*
@@ -14,9 +14,17 @@ 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 oil");
+        }
+        else if (v instanceof HybridCar) {
+            System.out.println("Check engine oil and battery system");
+        }
     }
 }