CODEWITHSUNDEEP
javaarrays
T H PaNier
T H PaNier

Reputation: 3

How to make 2 dimensional array containing lists

I've got a type Package, and I want to make something like a rubic's cube. I want to make the floor with a 2-dimensional array and each entry will hold a list (3D).

Making my 2D array 

Package[][] floor = new Package[x][y];

And I've got my List of package, and want to make something like this 

floor[i][j]= (new ArrayList <Package>()); in a loop

Can someone explain why I've got the error message:

"Cannot convert Package to ArrayList Package"

On my lessons teacher said, I can do something like this.

Upvotes: 0

Views: 61

Answers (1)

Gromo
Gromo

Reputation: 400

Your array is declared to store Package type objects. I assume that you want to store Lists of Package objects in that array.

I found answer on Stack which tells that you cannot create arrays of parameterized objects. It means that you are unable to create array of lists.

Guy who answered thst question shows example of how to create ArrayList of ArrayLists. Using that example you should be able to create what you want. You have to create 2D ArrayList of Lists.

Link to answer on stack

Upvotes: 1

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