move()

src/train/Position.java

@@ -21,7 +21,7 @@ package train;
  */
 public class Position implements Cloneable {
 	private final Direction direction;
-	private final Element pos;
+	private  Element pos;
 
 	public Position(Element elt, Direction d) {
 		if (elt == null || d == null)
@@ -44,6 +44,24 @@ public class Position implements Cloneable {
 	public Element getPos() {
 		return pos;
 	}
+	
+	public void move(Railway railway) {
+        if (railway == null) {
+            throw new NullPointerException("Railway cannot be null.");
+        }
+
+        try {
+            // Get the next element based on the current position and direction
+            Element nextElement = railway.nextElement(this.pos, this.direction);
+            this.pos = nextElement;
+            
+        } catch (IllegalArgumentException e) {
+            // If no next element exists, reverse the direction
+            this.direction.turn();
+        }
+    }
+
+    
 
 	@Override
 	public String toString() {