limit the amount of players to 6

Projekte/monopoly/model/src/main/java/pp/monopoly/game/server/PlayerHandler.java

@@ -7,11 +7,13 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Set;
+
+import pp.monopoly.model.LimitedLinkedList;
 /**
  * A class for helping with player actions and managing thier turns
  */
 public class PlayerHandler {
-    private List<Player> players = new LinkedList<>();
+    private List<Player> players = new LimitedLinkedList<>(6);
     private Set<Player> readyPlayers = new HashSet<>();
     private ServerGameLogic logic;
     private Player hostPlayer;

Projekte/monopoly/model/src/main/java/pp/monopoly/model/LimitedLinkedList.java

@@ -0,0 +1,49 @@
+package pp.monopoly.model;
+
+import java.util.LinkedList;
+
+/**
+ * A LinkedList with a maximum size limit.
+ *
+ * @param <E> the type of elements held in this collection
+ */
+public class LimitedLinkedList<E> extends LinkedList<E> {
+
+    private final int maxSize;
+
+    /**
+     * Constructs a LimitedLinkedList with the specified maximum size.
+     *
+     * @param maxSize the maximum number of elements this list can hold
+     */
+    public LimitedLinkedList(int maxSize) {
+        if (maxSize <= 0) {
+            throw new IllegalArgumentException("Max size must be greater than 0");
+        }
+        this.maxSize = maxSize;
+    }
+
+    /**
+     * Adds an element to the list. If the list exceeds its maximum size,
+     * the oldest element (first) is removed.
+     *
+     * @param element the element to be added
+     * @return true if the element was added successfully
+     */
+    @Override
+    public boolean add(E element) {
+        if (size() >= maxSize) {
+            return false;
+        }
+        return super.add(element);
+    }
+
+    /**
+     * Gets the maximum size of this list.
+     *
+     * @return the maximum size
+     */
+    public int getMaxSize() {
+        return maxSize;
+    }
+}