How can I declare an arr1 of ARRAY_SIZE with the appropriate type 64 bit integer

public class Sorting { static final String IN_FILE = "sorting.txt"开发者_如何学Python; static final int ARRAY_SIZE = 20000;

static public void main(String[] args) {

   int[] arr1= new int [ARRAY_SIZE];

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long is 64bit, signed, two's complement integer.

long[] arr1= new long [ARRAY_SIZE];