Find elements surrounding an element in an array

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You can use ‘direction array’ in form

[[-1,-1], [-1,0],[1,0]..and so on]

And method which takes point coordinate and iterates through direction array -> add direction numbers to coordinates, check indexes are not out of bounds and collect results.
Something like this:

private static int[][] directions = new int[][]{{-1,-1}, {-1,0}, {-1,1},  {0,1}, {1,1},  {1,0},  {1,-1},  {0, -1}};

static List<Integer> getSurroundings(int[][] matrix, int x, int y){
    List<Integer> res = new ArrayList<Integer>();
    for (int[] direction : directions) {
        int cx = x + direction[0];
        int cy = y + direction[1];
        if(cy >=0 && cy < matrix.length)
            if(cx >= 0 && cx < matrix[cy].length)
                res.add(matrix[cy][cx]);
    }
    return res;
}

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