求解这三句在井字棋设计里的意思

Question

public void computerMove() {
// 编码双方的棋局
int manMap = encodeManMap();
int computerMap = encodeComputerMap();
// 先看是否有致胜走法
int move = getWinningMove(computerMap);
if (move >= 0) {
this.sign[move] = 'o';

move = 8 - move;

int yIndex = move / 3;

int xIndex = move - 3 * yIndex;

            Point ch = new Point(xIndex, yIndex, Color.blue);
            this.chessList[(this.chessCount++)] = ch;
            return;
        }

Answer 1

表示6是第三行第一个。