overrode hachCode and equals method of Piece

Projekte/mdga/model/src/main/java/pp/mdga/game/Piece.java

@@ -131,4 +131,37 @@ public UUID getUuid() {
     public String toString() {
         return "Piece with UUID: %s and color: %s with state: %s".formatted(this.uuid, color, state);
     }
+
+    /**
+     * This method will be used to create the hash code of this Piece class.
+     *
+     * @return hashCode as an Integer.
+     */
+    @Override
+    public int hashCode() {
+        return this.uuid.hashCode();
+    }
+
+    /**
+     * This method will be used to check if the given obj parameter is equal to this object.
+     * It will return false if the obj parameter is null or if the hash codes of both objects are not equal. Otherwise
+     * it will return true.
+     *
+     * @param obj as the object which will be compared as an Object.
+     * @return true or false.
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+
+        if (obj instanceof Piece) {
+            Piece piece = (Piece) obj;
+
+            return this.hashCode() == piece.hashCode();
+        }
+
+        return false;
+    }
 }