How to create an LinkedList[]?

Question

What would be the syntax to create a LinkedList<Object[]>[] type variable?

I have tried:

public LinkedList<Object[]>[] myList = new LinkedList<Object[]>()[];

but this doesn't work.

See http://stackoverflow.com/questions/3853411/array-type-in-generics — Atreys, Aug 05 '11 at 19:46
I smell a generic design problem. Have you ever heard of javabeans? — BalusC, Aug 05 '11 at 19:56
It's an Android app. :D @Atreys, thanks for the helpful link. — pqn, Aug 05 '11 at 20:09

score 2 · Accepted Answer · answered Aug 05 '11 at 19:49

2

In Java you can't create generic arrays. You can however do this with ArrayList class or any class that implements the List interface.

List<LinkedList<Object[]>> myList = new ArrayList<LinkedList<Object[]>>();

answered Aug 05 '11 at 19:49

Hunter McMillen

59,865
24
119
170

score 1 · Answer 2 · edited May 23 '17 at 12:29

The declaration LinkedList<Object[]>[] means an array of lists of arrays - is that the intention? Assuming that it is, you create it with the syntax for creating arrays:

public LinkedList<Object[]>[] myArray = new LinkedList[ARRAY_SIZE];

This creates an array of the specified size (ARRAY_SIZE), each cell of which is null.

Note that:

Since you can't create generic arrays in Java, as Hunter McMillen noticed, the right part omits the type of the LinkedList (i.e. "<Object[]>").
I took the liberty of renaming the variable from myList to myArray, since it's an array and not a list.
It's usually a good idea to use the interface (List) and not a specific implementation (LinkedList), unless you need to use methods specific to LinkedList.

So the line would look like this:

public List<Object[]>[] myArray = new List[ARRAY_SIZE];

Creating an array or List without specifying the type of the right hand side is an unsafe operation. — Hunter McMillen, Aug 05 '11 at 20:27

How to create an LinkedList[]?

2 Answers2

Linked