How to reverse for loop?

Question

I have a method with some logic

first it looked like:

static boolean checkWin(char dot) {
    if (map[0][0] == dot && map[0][1] == dot && map[0][2] == dot) {
        return true;
    }
    //more code
    if (map[0][2] == dot && map[1][1] == dot && map[2][0] == dot) {
        return true;
    }

    return false;
}

With loops I refactored the method:

static boolean checkWin(char dot) {
    for (int i = 0; i <map.length ; i++) {
        for (int j = 0; j < map[i].length; j++) {
            if (map[0][i] == dot && i == 2) {
                return true;
            }
            if (map[1][i] == dot && i == 2) {
                return true;
            }
            if (map[2][i] == dot && i == 2) {
                return true;
            }
            if (map[i][0] == dot && i == 2) {
                return true;
            }
            if (map[i][1] == dot && i == 2) {
                return true;
            }
            if (map[i][2] == dot && i == 2) {
                return true;
            }

            if (map[i][i] == dot && i == 2) {
                return true;
            }

            if (map[0][2] == dot && map[1][1] == dot && map[2][0] == dot) {
                return true;
            }
        }
    }
    return false;
}

I have a problem with this line of code:

if (map[0][2] == dot && map[1][1] == dot && map[2][0] == dot) 
    return true;
}

I need to get map[i][?], ? should assume the value 2, 1 and 0 when i equals to 0, 1 and 2 respectively.

How can I achieve it?

Answer 1

Try to decrease it

 for (int i = 2; i > = 0; i--) {
            
 }

i will be 2 1 0

P.S I think you missed 2 there

P.S If I understand your question correctly, you need to have 2 1 0 inside loop without modifying for itself? In that case try:

 for (int i = 3; i < 3; i++) {
   ... 2 - i
 }