diff --git a/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/AlternativeMultipeTypeList.java b/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/AlternativeMultipeTypeList.java
index d80f4627d3..6dd44e0ffa 100644
--- a/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/AlternativeMultipeTypeList.java
+++ b/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/AlternativeMultipeTypeList.java
@@ -25,8 +25,8 @@ public class AlternativeMultipeTypeList {
 
         // List of Custom Object
         ArrayList<CustomObject> objList = new ArrayList<>();
-        objList.add(new CustomObject("obj1", 1));
-        objList.add(new CustomObject("obj2", 2));
+        objList.add(new CustomObject("String"));
+        objList.add(new CustomObject(2));
 
         // List via Functional Interface
         List<Object> dataList = new ArrayList<>();
@@ -36,6 +36,9 @@ public class AlternativeMultipeTypeList {
         UserFunctionalInterface myInterface = (listObj, data) -> {
             if (myPricate.test(data))
                 listObj.add(data);
+            else
+                System.out.println("Skipping input as data not allowed for class: " + data.getClass()
+                    .getSimpleName());
             return listObj;
         };
 
diff --git a/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/CustomObject.java b/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/CustomObject.java
index f4d4be989d..eec81523f4 100644
--- a/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/CustomObject.java
+++ b/core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multiple/objecttypes/CustomObject.java
@@ -8,8 +8,7 @@ public class CustomObject {
         this.classData = classData;
     }
 
-    CustomObject(String classData, Integer intData) {
-        this.classData = classData;
+    CustomObject(Integer intData) {
         this.intData = intData;
     }