advanced oop

.idea/misc.xml

@@ -8,7 +8,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_26" project-jdk-name="26" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

src/main/java/org/Main.java

@@ -1,126 +1,157 @@
 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 tesla =
-        //    - ElectricCar
+                new ElectricCar(
-        //    - GasCar
+                        "Tesla",
-        //    - SportsCar
+                        "Model 3",
-        //
+                        2024,
-        // Requirements:
+                        6000,
-        //   • Use the constructors you created in each class.
+                        5,
-        //   • Provide realistic values (brand, model, year, mileage, etc.).
+                        75,
-        //   • Store them in variables such as:
+                        80
-        //          ElectricCar tesla = new ElectricCar(...);
+                );
-        // ============================================================
+
+
+
+        GasCar toyota =
+                new GasCar(
+                        "Toyota",
+                        "Camry",
+                        2022,
+                        15000,
+                        5,
+                        60,
+                        "Petrol"
+                );
+
+
+
+        SportsCar ferrari =
+                new SportsCar(
+                        "Ferrari",
+                        "488",
+                        2023,
+                        7000,
+                        2,
+                        90,
+                        "Premium Petrol",
+                        3.2
+                );
+
+
+
+        Vehicle[] vehicles =
+                {
+                        tesla,
+                        toyota,
+                        ferrari
+                };
+
+
+
+        System.out.println("=== Vehicle Information ===");
+
+
+        for(Vehicle v : vehicles){
+
+            v.basicInfo();
+
+            System.out.println();
+
+        }
 
 
 
 
+        System.out.println("=== Inspection ===");
 
-        // ============================================================
+
-        // TODO 2:
+        for(Vehicle v : vehicles){
-        // Create an array of Vehicle:
+
-        //       Vehicle[] vehicles = { ... };
+            VehicleInspector.inspect(v);
-        //
+
-        // This array MUST contain the objects created above.
+            System.out.println();
-        // This demonstrates **polymorphism** because all different
+
-        // subclasses (ElectricCar, GasCar, SportsCar) are stored
+        }
-        // as their parent type (Vehicle).
-        // ============================================================
 
 
 
 
+        Serviceable[] serviceables =
+                {
+                        tesla,
+                        toyota,
+                        ferrari
+                };
 
-        // ============================================================
+
-        // TODO 3:
+
-        // Loop through the Vehicle[] array and:
+        System.out.println("=== Service Check ===");
-        //   • Call v.basicInfo();
+
-        //   • Print a blank line after each.
+
-        //
+
-        // Purpose:
+        for(Serviceable s : serviceables){
-        //   Demonstrate that all subclasses share the same Vehicle
+
-        //   behavior and can call inherited methods.
+
-        // ============================================================
+            Vehicle v = (Vehicle)s;
+
+
+
+            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();
+
+        }
 
 
 
 
-
+        System.out.println(
-        // ============================================================
+                "=== Workshop Completed ==="
-        // 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 ===");
-        //
-        // ============================================================
-
-
-
 
 
     }
+
 }

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

@@ -1,41 +1,56 @@
 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 {
 
     private 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"
 
-    // TODO: Override showDetails()
+    public int getSeats(){
-    // Print brand, model, year, mileage, and number of seats
+        return seats;
+    }
 
-    /*
+
-     * Implement Serviceable methods:
+    @Override
-     *
+    public String getEnergyType() {
-     * needsService(Vehicle v):
+
-     * - Check the mileage of the current car
+        return "Unknown";
-     * - If mileage > 10000 return true
+    }
-     * - Otherwise return false
+
-     *
+
-     * performService():
+    @Override
-     * - Print: "General car service completed"
+    public void showDetails(){
-     */
+
+        System.out.println(
+                "Brand: " + getBrand()
+                        + "\nModel: " + getModel()
+                        + "\nYear: " + getYear()
+                        + "\nMileage: " + getMileage()
+                        + "\nSeats: " + seats
+        );
+    }
+
+
+    @Override
+    public boolean needsService(Vehicle v){
+
+        return v.getMileage() > 10000;
+    }
+
+
+    @Override
+    public void performService(){
+
+        System.out.println("General car service completed");
+    }
 }

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

@@ -1,39 +1,84 @@
 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 {
 
+
     private int batteryCapacity;
     private 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"
 
-    // TODO: Override showDetails()
-    // Call super.showDetails()
-    // Print battery capacity and charge level
 
-    // TODO: Implement charge(double amount)
+    @Override
-    // Validate negative
+    public String getEnergyType(){
-    // Cap at 100
+
+        return "Electric";
+    }
+
+
+
+    @Override
+    public void showDetails(){
+
+        super.showDetails();
+
+        System.out.println(
+                "Battery Capacity: " + batteryCapacity
+                        + "\nCharge Level: " + chargeLevel
+        );
+    }
+
+
+
+    @Override
+    public void charge(double amount){
+
+        if(amount < 0){
+
+            System.out.println("Charge amount cannot be negative");
+            return;
+        }
+
+
+        chargeLevel += amount;
+
+
+        if(chargeLevel > 100){
+
+            chargeLevel = 100;
+        }
+    }
+
+
+
+    @Override
+    public boolean needsService(Vehicle v){
+
+        return v.getMileage() > 8000;
+    }
+
+
+
+    @Override
+    public void performService(){
+
+        System.out.println("Battery system checked");
+
+        chargeLevel = 100;
+    }
+
 }

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

@@ -1,39 +1,91 @@
 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 {
 
+
     private double fuelLevel;
     private 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)"
 
-    // TODO: Implement refuel(double amount)
-    // Validate amount
-    // Cap at 100
 
-    // TODO: Override showDetails()
+    @Override
-    // Call super.showDetails()
+    public String getEnergyType(){
-    // Print fuel level and fuel type
+
+        return fuelType + " (Gas)";
+    }
+
+
+
+
+    @Override
+    public void refuel(double amount){
+
+        if(amount < 0){
+
+            System.out.println("Fuel amount cannot be negative");
+            return;
+        }
+
+
+        fuelLevel += amount;
+
+
+        if(fuelLevel > 100){
+
+            fuelLevel = 100;
+        }
+
+    }
+
+
+
+
+    @Override
+    public void showDetails(){
+
+        super.showDetails();
+
+
+        System.out.println(
+                "Fuel Level: " + fuelLevel
+                        + "\nFuel Type: " + fuelType
+        );
+
+    }
+
+
+
+
+    @Override
+    public boolean needsService(Vehicle v){
+
+        return v.getMileage() > 12000;
+    }
+
+
+
+    @Override
+    public void performService(){
+
+        System.out.println("Engine oil changed");
+
+        fuelLevel = 100;
+    }
+
 }

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

@@ -1,30 +1,57 @@
 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;
 
+
+
     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: " + zeroToHundred + " seconds"
+        );
+
+    }
+
+
+
+
+    @Override
+    public boolean needsService(Vehicle v){
+
+        return v.getMileage() > 5000;
+    }
+
+
+
+    @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 +14,37 @@ public abstract class Vehicle {
         this.mileage = mileage;
     }
 
-    // TODO: Create getters for all fields
 
-    // TODO: Implement addMileage(double km)
+    public String getBrand() {
-    // If km is negative → print error
+        return brand;
-    // Otherwise increase mileage
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public int getYear() {
+        return year;
+    }
+
+    public double getMileage() {
+        return mileage;
+    }
+
+
+    public void addMileage(double km) {
+
+        if(km < 0){
+            System.out.println("Mileage cannot be negative");
+            return;
+        }
+
+        mileage += km;
+    }
+
+
+    public abstract String getEnergyType();
 
-    // TODO: Declare abstract method getEnergyType()
 
     public void basicInfo() {
         System.out.println(
@@ -36,5 +54,6 @@ public abstract class Vehicle {
         );
     }
 
+
     public abstract void showDetails();
 }

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

@@ -1,22 +1,40 @@
 package org.util;
 
-import org.*;
-import org.model.Vehicle;
 
-/*
+import org.model.*;
- * Utility class to inspect vehicles.
+
- * Demonstrates instanceof and polymorphism.
- */
 
 public class VehicleInspector {
 
-    public static void inspect(Vehicle v) {
+
+    public static void inspect(Vehicle v){
+
 
         v.basicInfo();
 
-        // TODO:
+
-        // If ElectricCar → print "Check battery system"
+        if(v instanceof ElectricCar){
-        // If SportsCar → print "Check brakes and performance"
+
-        // If GasCar → print "Check engine and oil"
+            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"
+            );
+
+        }
+
     }
+
 }