public int islandPerimeter(int[][] grid) {
    int[][] neighbors = {
            {-1, 0},
            {0, -1},
            {0, 1},
            {1, 0}
    };
    int perimeter = 0;
    for (int x = 0; x < grid.length; x++) {
        for (int y = 0; y < grid[x].length; y++) {
            if (grid[x][y] == 0) continue;
            for (int[] neighbor : neighbors) {
                try {
                    if (grid[x + neighbor[0]][y + neighbor[1]] == 0) perimeter++;
                } catch (ArrayIndexOutOfBoundsException exception) {
                    perimeter++;
                }
            }
        }
    }
    return perimeter;
}