implement solution

Author: SteffenLm

Exercise.java

@@ -1,12 +1,19 @@
 public class Exercise {
 
   public static void main(String[] args) {
+    int numberOfVehicles;
+    numberOfVehicles = Vehicle.getNumberOfVehicles();
+    System.out.println("Anzahl Fahrzeuge: " + numberOfVehicles);
 
-    Vehicle vehicle = new Vehicle("Porsche", "911");
+    Vehicle vehicle1 = new Vehicle("Porsche", "911");
+    Vehicle vehicle2 = new Vehicle("MAN", "TGX");
+    Vehicle vehicle3 = new Vehicle("Opel", "Zafira Life");
 
-    vehicle.accelerate(30);
-    vehicle.accelerate(30);
-    vehicle.brake(20);
-    vehicle.accelerate(40);
+    numberOfVehicles = Vehicle.getNumberOfVehicles();
+    System.out.println("Anzahl Fahrzeuge: " + numberOfVehicles);
+
+    vehicle1.print();
+    vehicle2.print();
+    vehicle3.print();
   }
 }

Vehicle.java

@@ -3,10 +3,12 @@ public class Vehicle {
   private String make;
   private String model;
   private double speed;
+  private static int numberOfVehicles;
 
   public Vehicle(String make, String model) {
     this.make = make;
     this.model = model;
+    numberOfVehicles++;
   }
 
   public String getMake() {
@@ -17,6 +19,10 @@ public String getModel() {
     return model;
   }
 
+  public static int getNumberOfVehicles() {
+    return numberOfVehicles;
+  }
+
   public void accelerate(int value) {
     speed += value;
     System.out.println(make + " " + model + " beschleunigt auf " + speed + "km/h");