Never mind it's create a two dimensional array and then return the [x] position
here is a more readable example
int[] eArr3 = new int[][]{{57},{1},{2},{3}}[0];
The lines of code that you have mentioned above will not compile because there is one set of [] missing in the variable declaration part. It should be int[][] eArr3 or int[] eArr3[] instead of int[] eArr3.