Я сдал 3 на джаве обалдеть

EntityWithIlumCreator.java

@@ -1,43 +1,35 @@
+import java.util.ArrayList;
 import java.util.Random;
 
 public class EntityWithIlumCreator <T extends EntityAirbus, U extends IDrawingIlum>
 {
-    private final Object[] entityArr;
-    private final Object[] IlumArr;
+    private final ArrayList<T> entityArr;
+    private final ArrayList<U> IlumArr;
 
-    int entitiesCount = 0;
-    int ilumCount = 0;
-
-    public EntityWithIlumCreator(int countEntities, int countExtra) {
-        entityArr = new Object[countEntities];
-        IlumArr = new Object[countExtra];
+    public EntityWithIlumCreator() {
+        entityArr = new ArrayList<T>();
+        IlumArr =  new ArrayList<U>();
     }
 
     public void Insert(T entityAirbus) {
-        if(entitiesCount < entityArr.length) {
-            entityArr[entitiesCount] = entityAirbus;
-            entitiesCount++;
-        }
+        entityArr.add(entityAirbus);
     }
 
-    public void Insert (U extra) {
-        if(ilumCount < IlumArr.length) {
-            IlumArr[ilumCount] = extra;
-            ilumCount++;
-        }
+    public void Insert (U ilum) {
+        IlumArr.add(ilum);
     }
 
     public DrawingAirbus getEntityWithExtra() {
         Random random = new Random();
-        int getEntityRandomIndex = random.nextInt(entityArr.length);
-        int getExtraRandomIndex = random.nextInt(IlumArr.length);
+        int getEntityRandomIndex = random.nextInt(entityArr.size());
+        int getExtraRandomIndex = random.nextInt(IlumArr.size());
 
-        EntityAirbus airbus = (T)entityArr[getEntityRandomIndex];
-        IDrawingIlum ilum = (U) IlumArr[getExtraRandomIndex];
+        EntityAirbus airbus = entityArr.get(getEntityRandomIndex);
+        IDrawingIlum ilum = IlumArr.get(getExtraRandomIndex);
 
         if (airbus instanceof EntityAdvancedAirbus) {
             return  new DrawingAdvancedAirbus(airbus, ilum);
         }
         return new DrawingAirbus(airbus, ilum);
     }
-}
+}