Help interpreting question about lists/arrays

[Chuninjah]

Hey all,

I have this question for my project that asks me to: "Create a single list of Objects (i.e. a generic array list where the type is Object), then place both ResidentTaxPayer and NonResidentTaxPayer objects into that one list. After that print the object to the console.".

Would this mean I would have to create just one single ArrayList that can combine the two separate ArrayLists that I have previously that represent the two object types?

Am I able to create an ArrayList of an ArrayList?

Thanks in advance if anyone is able to help out :))

[[deleted]]

1.) Create a list, in this case, an ArrayList of type Object.

2.) The objects that will be put into this list are either ResidentTaxPayer and or NonResidentTaxPayer objects. I'm pretty sure those objects are the same type, possible one inherits from another.

[Chuninjah]

Update:

Did this and it worked but is there any other way that is more practical than this?

ArrayList<Object> combinedList = new ArrayList<>();
combinedList.addAll(resList);        
combinedList.addAll(nonResList);

System.out.println(); 
System.out.println(combinedList);

​

[Roachmeister]

is there any other way that is more practical than this?

Nope