Check ArrayList for instance of object

Question

I have a java method that should check through an ArrayList and check if it contains an instance of a given class. I need to pass the method the type of class to check for a

Answer 1

check one of the the item instance in the list

if (object instanceof ArrayList) {
                        if (((ArrayList) object).get(0) instanceof ClassA) {
                            classAList= (ArrayList) object;
                        } else if (((ArrayList) object).get(0) instanceof ClassB) {
                            classBList= (ArrayList) object;
                        } else if (((ArrayList) object).get(0) instanceof ClassC) {
                            classCList= (ArrayList) object;
                        }
                    }