implement todo tasks in Car.java

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

@@ -17,16 +17,29 @@ public abstract class Car extends Vehicle implements Serviceable {
 
     public Car(String brand, String model, int year,
                double mileage, int seats) {
-
+        super(brand, model, year, mileage);
         // TODO: Call super constructor
         this.seats = seats;
     }
 
+    @Override
+    public String getEnergyType() {
+        return "Unknown";
+    }
     // TODO: Override getEnergyType() → return "Unknown"
 
+    @Override
+    public void showDetails() {
+        System.out.println("Car details: brand: " + this.getBrand() + ", model: "
+                + this.getModel() + ", year: " + this.getYear() + ", mileage: "
+                + this.getMileage() + ", number of seats: " + this.seats);
+    }
     // TODO: Override showDetails()
     // Print brand, model, year, mileage, and number of seats
 
+    public Boolean needService(Vehicle v) {
+        return v.getMileage() > 10000;
+    }
     /*
      * Implement Serviceable methods:
      *
@@ -34,8 +47,11 @@ public abstract class Car extends Vehicle implements Serviceable {
      * - Check the mileage of the current car
      * - If mileage > 10000 return true
      * - Otherwise return false
-     *
+     */
-     * performService():
+    public void performService() {
+        System.out.println("General car service completed");
+    }
+     /* performService():
      * - Print: "General car service completed"
      */
 }