implement solution

Author: SteffenLm

Car.java

@@ -0,0 +1,24 @@
+public class Car extends Vehicle {
+
+  private int seats;
+
+  public Car(String make, String model, Engine engine, int seats) {
+    super(make, model, engine);
+    this.seats = seats;
+  }
+
+  public int getSeats() {
+    return seats;
+  }
+
+  public void doATurboBoost() {
+    speed *= 2;
+    System.out.println(
+        getMake() + " " + getModel() + " macht einen Turboboost und beschleunigt auf " + speed + " km/h");
+  }
+
+  public void print() {
+    System.out.println(
+        getMake() + " " + getModel() + " (" + getEngine().getDescription() + ", " + seats + " Sitzplaetze)");
+  }
+}

Exercise.java

@@ -5,15 +5,20 @@ public static void main(String[] args) {
     numberOfVehicles = Vehicle.getNumberOfVehicles();
     System.out.println("Anzahl Fahrzeuge: " + numberOfVehicles);
 
-    Vehicle vehicle1 = new Vehicle("Porsche", "911", Engine.ELECTRO);
-    Vehicle vehicle2 = new Vehicle("MAN", "TGX", Engine.DIESEL);
-    Vehicle vehicle3 = new Vehicle("Opel", "Zafira Life", Engine.DIESEL);
+    Car car1 = new Car("Porsche", "911", Engine.ELECTRO, 2);
+    Truck truck1 = new Truck("MAN", "TGX", Engine.DIESEL, 20);
+    Car car2 = new Car("Opel", "Zafira Life", Engine.DIESEL, 7);
 
     numberOfVehicles = Vehicle.getNumberOfVehicles();
     System.out.println("Anzahl Fahrzeuge: " + numberOfVehicles);
 
-    vehicle1.print();
-    vehicle2.print();
-    vehicle3.print();
+    car1.print();
+    truck1.print();
+    car2.print();
+
+    car1.accelerate(50);
+    truck1.transform();
+    car1.doATurboBoost();
+    truck1.transform();
   }
 }

Truck.java

@@ -0,0 +1,32 @@
+public class Truck extends Vehicle {
+
+  private int cargo;
+  private boolean isTransformed;
+
+  public Truck(String make, String model, Engine engine, int cargo) {
+    super(make, model, engine);
+    this.cargo = cargo;
+  }
+
+  public int getCargo() {
+    return cargo;
+  }
+
+  public boolean isTransformed() {
+    return isTransformed;
+  }
+
+  public void transform() {
+    if (isTransformed) {
+      isTransformed = false;
+      System.out.println(getMake() + " " + getModel() + " verwandelt sich in einen Lastwagen zurueck");
+    } else {
+      isTransformed = true;
+      System.out.println(getMake() + " " + getModel() + " verwandelt sich in einen Autobot");
+    }
+  }
+
+  public void print() {
+    System.out.println(getMake() + " " + getModel() + " (" + getEngine().getDescription() + ", " + cargo + "t)");
+  }
+}

Vehicle.java

@@ -3,7 +3,7 @@ public class Vehicle {
   private String make;
   private String model;
   private Engine engine;
-  private double speed;
+  protected double speed;
   private static int numberOfVehicles;
 
   public Vehicle(String make, String model, Engine engine) {