is it possible to create a regular array that hold arraylist objects?

Question

i tried the following

ArrayList<FileFilter>[] allFilters = new ArrayList<FileFilter>()[10]

and i get

The type of the expression must be an array type but it resolved to ArrayList<FileFilter>

is it possible (i'm using java). btw reason i am doing it is because i am trying to filter out files. some filters are or_filters, in which case i put them all in the same place in the regular array, and some are and_filters which are in another place in the regular array. is there any better idea?

score 1 · Accepted Answer · answered Mar 14 '11 at 05:19

1

Get rid of the parentheses on the right. You are actually calling the constructor for a single instance of ArrayList:

ArrayList<FileFilter>[] allFilters = new ArrayList<FileFilter>[10];

Edit: Note that this doesn't actually create any ArrayList objects; it just creates an array of 10 references, all set to null. You'll have to fill in the elements of the array.

answered Mar 14 '11 at 05:19

Ted Hopp

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now i get "Cannot create a generic array of ArrayList" – yotamoo Mar 14 '11 at 05:21
Right. Get rid of the generic parameter on the right as well: `new ArrayList[10];` – Ted Hopp Mar 14 '11 at 05:23

is it possible to create a regular array that hold arraylist objects?

1 Answers1