如何从数据文件中正确加载3x3矩阵?

我正在做一个Tic Tac Toe项目,在该项目中,我导入了X和O的9个字符串:

XOOXXOOXX

然后我必须将其拆分,加载到3x3矩阵中,然后测试并看看谁赢得了比赛。我已经编写了加载文件并运行游戏的代码,如下所示:

public static void main( String args[] ) throws IOException
{
    Scanner importer = new Scanner(new File("testdata.dat"));

    int count = importer.nextInt();
    System.out.println(count + " games to test.");


    for(int i = 0; i < count; i++) {
        String game = importer.next();

        TicTacToe gamecalc = new TicTacToe();

        System.out.println(gamecalc.getWinner(game));
    }
}

然而,当我尝试加载已经建立的3x3矩阵时,如下所示:

String gamedata = game; //gamedata is passed in, reassigned to game

for(int line = 0; line < 2; line++) {
        for(int column = 0; column < 2; column++) {

        gamemat[line][column] = game.charAt(line * column);

        }
    }

并且所述数据集是:

abcdefghi
jklmnopqr
stuvwxyz1
234567890
ABCDEFGHI

使用Arrays.toString打印时,结果是:

[a, a,  ][a, b,  ][ ,  ,  ] //each line is one 3x3 matrix
[j, j,  ][j, k,  ][ ,  ,  ]
[s, s,  ][s, t,  ][ ,  ,  ]
[2, 2,  ][2, 3,  ][ ,  ,  ]
[A, A,  ][A, B,  ][ ,  ,  ]

如何修改算法以正确加载矩阵?谢谢