vineetrok vineetrok - 5 months ago 12
Java Question

find elements surrounding and element in an array

I have a multidimensional array, I want to get the elements surrounding a particular element in that array. For example if I have the following:

[[1,2,3,4,5,6]
[8,9,7,5,2,6]
[1,6,8,7,5,8]
[2,7,9,5,4,3]
[9,6,7,5,2,1]
[4,7,5,2,1,3]]


How do I find all the 8 elements around any of the above elements. and how do I take care of elements at the edges.

One way I figured out is, to write a 9 line code for this , which is obvious, is there a better solution?
thanks

Answer
for (i = 0; i < array.length; i++) {
            for (j = 0; j < array[i].length; j++) {
                for (x = Math.max(0, i - 1); x <= Math.min(i + 1, array.length); x++) {
                    for (y = Math.max(0, j - 1); y <= Math.min(j + 1,
                            array[i].length); y++) {
                        if (x >= 0 && y >= 0 && x < array.length
                                && y < array[i].length) {
                            if(x!=i || y!=j){
                            System.out.print(array[x][y] + " ");
                            }
                        }
                    }
                }
                System.out.println("\n");
            }
        }

Thanks to all the people who have answered, but i figured it out with the help of this post which i found just now, and above is the solution. thanks again :)

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