refactoring done in several classes

src/main/java/ch/zhaw/pm2/racetrack/Car.java

@@ -3,14 +3,12 @@ package ch.zhaw.pm2.racetrack;
 import ch.zhaw.pm2.racetrack.given.CarSpecification;
 import ch.zhaw.pm2.racetrack.strategy.MoveStrategy;
 
-import java.util.Vector;
-
 /**
  * Class representing a car on the racetrack.
  * Uses {@link PositionVector} to store current position on the track grid and current velocity vector.
- * Each car has an identifier character which represents the car on the race track board.
+ * Each car has an identifier character which represents the car on the racetrack board.
  * Also keeps the state, if the car is crashed (not active anymore). The state can not be changed back to uncrashed.
- * The velocity is changed by providing an acelleration vector.
+ * The velocity is changed by providing an acceleration vector.
  * The car is able to calculate the endpoint of its next position and on request moves to it.
  */
 public class Car implements CarSpecification {
@@ -46,7 +44,8 @@ public class Car implements CarSpecification {
 
     /**
      * Constructor for class Car
-     * @param id unique Car identification
+     *
+     * @param id       unique Car identification
      * @param position initial position of the Car
      */
     public Car(char id, PositionVector position) {
@@ -59,16 +58,16 @@ public class Car implements CarSpecification {
      *
      * @return id of the car.
      */
-    public char getID(){
+    public char getID() {
         return id;
     }
 
     public void increaseWinPoints() {
-        winPoints ++;
+        winPoints++;
     }
 
     public void deductWinPoints() {
-        winPoints --;
+        winPoints--;
     }
 
     public int getWinPoints() {
@@ -80,9 +79,10 @@ public class Car implements CarSpecification {
      *
      * @return velocity current velocity of the car.
      */
-    public PositionVector getVelocity(){
+    public PositionVector getVelocity() {
         return velocity;
     }
+
     /**
      * Set this Car position directly, regardless of current position and velocity.
      * This should only be used by the game controller in rare cases to set the crash or winning position.
@@ -95,8 +95,7 @@ public class Car implements CarSpecification {
     public void setPosition(final PositionVector position) {
         if (position.getX() < 0 || position.getY() < 0) {
             throw new IllegalArgumentException();
-        }
-        else {
+        } else {
             this.position = position;
         }
     }
@@ -109,7 +108,7 @@ public class Car implements CarSpecification {
      */
     @Override
     public PositionVector nextPosition() {
-        return new PositionVector(position.getX() + velocity.getX(),position.getY() + velocity.getY());
+        return new PositionVector(position.getX() + velocity.getX(), position.getY() + velocity.getY());
     }
 
     /**
@@ -123,11 +122,10 @@ public class Car implements CarSpecification {
      */
     @Override
     public void accelerate(PositionVector.Direction acceleration) {
-        if(acceleration.vector.getX() < -1 || acceleration.vector.getX() > 1||
+        if (acceleration.vector.getX() < -1 || acceleration.vector.getX() > 1 ||
             acceleration.vector.getY() < -1 || acceleration.vector.getY() > 1) {
             throw new IllegalArgumentException();
-        }
-        else {
+        } else {
             velocity = new PositionVector(velocity.getX() + acceleration.vector.getX(),
                 velocity.getY() + acceleration.vector.getY());
         }
@@ -161,6 +159,7 @@ public class Car implements CarSpecification {
 
     /**
      * Set move strategy
+     *
      * @param moveStrategy Strategy to be implemented
      */
     public void setMoveStrategy(MoveStrategy moveStrategy) {
@@ -169,6 +168,7 @@ public class Car implements CarSpecification {
 
     /**
      * Get current move strategy
+     *
      * @return MoveStrategy
      */
     public MoveStrategy getMoveStrategy() {