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;
}