Can't declare a long array in java

Question

Code:

 long Height ;
 long[][] results = new long[Height][Height];

Eclipse giving me an error But:

long[][] results = new long[(int) Height][(int) Height];

this is not. I want to have a range of long, So i want a long array

Generally, variables in Java should be lower-cased (for example, `height`). — nanofarad, Sep 11 '14 at 15:42
Multiple duplicates, also including http://stackoverflow.com/questions/878309/java-array-with-more-than-4gb-elements . — Andy Thomas, Sep 11 '14 at 15:57

score 8 · Answer 1 · answered Sep 11 '14 at 15:41

8

The array will contains long values, but the array size accepts only ints

answered Sep 11 '14 at 15:41

Marco Acierno

1

I would add that even though `Height` is cast, the array still behaves like an array of longs. – nanofarad Sep 11 '14 at 15:42
i want to have that range of numbers – user3856587 Sep 11 '14 at 15:43
@user3856587 why would you want an array of *94109400* elements? That maybe won't fit in memory. – Luiggi Mendoza Sep 11 '14 at 15:44
Maybe you want inside the array longs, and not the size? – Marco Acierno Sep 11 '14 at 15:45

score 2 · Answer 2 · answered Sep 11 '14 at 15:44

Array size should be state using an int. You can't use long for that. So the maximum 2D array that you can have is

long[][] results = new long[Integer.MAX_VALUE - 1][Integer.MAX_VALUE -1];

Integer.MAX_VALUE is 2147483647

So if you want to have more than that then it is better look for some other data structure

2 Answers2