implement solution

Author: SteffenLm

Exercise.java

@@ -1,24 +1,16 @@
 public class Exercise {
 
   public static void main(String[] args) {
-    int numberOfVehicles;
-    numberOfVehicles = Vehicle.getNumberOfVehicles();
-    System.out.println("Anzahl Fahrzeuge: " + numberOfVehicles);
+    Rental rental = new Rental("Fahrzeugvermietung Mueller");
 
     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);
+    rental.addVehicle(car1);
+    rental.addVehicle(truck1);
+    rental.addVehicle(car2);
 
-    car1.print();
-    truck1.print();
-    car2.print();
-
-    car1.accelerate(50);
-    truck1.transform();
-    car1.doATurboBoost();
-    truck1.transform();
+    rental.print();
   }
 }

Rental.java

@@ -0,0 +1,39 @@
+import java.util.ArrayList;
+
+public class Rental {
+
+  private String name;
+  private ArrayList<Vehicle> vehicles;
+
+  public Rental(String name) {
+    this.name = name;
+    vehicles = new ArrayList<>();
+  }
+
+  public void addVehicle(Vehicle vehicle) {
+    vehicles.add(vehicle);
+  }
+
+  public void addAllVehicles(Vehicle... vehicles) {
+    for (Vehicle v : vehicles) {
+      this.vehicles.add(v);
+    }
+  }
+
+  public void transformAllTrucks() {
+    for (Vehicle c : vehicles) {
+      if (c instanceof Truck) {
+        Truck t = (Truck) c;
+        t.transform();
+      }
+    }
+  }
+
+  public void print() {
+    System.out.println(name);
+    System.out.println("Unsere Fahrzeuge: ");
+    for (Vehicle v : vehicles) {
+      v.print();
+    }
+  }
+}