java - 这个二维数组有什么问题？

Question

我在 Java 中使用二维数组，这是第一次这样做。我想知道数组出了什么问题，因为我遇到了很多错误......？ (可能是一个非常愚蠢的错误)

代码

    int board[21][21] = {{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, 
  {1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},
  {1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1},
  {1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1},
  {1,0,1,0,0,1,0,1,0,0,0,0,0,1,0,1,0,0,1,0,1},
  {1,0,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,1},
  {1,0,0,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,0,1},
  {1,1,1,1,0,1,0,1,1,1,1,1,1,1,0,1,0,1,1,1,1},
  {0,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0},
  {1,1,1,1,1,1,1,1,0,1,1,1,0,1,1,1,1,1,1,1,1},
  {0,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,0,0,0,0},
  {1,1,1,1,0,1,0,1,1,1,1,1,1,1,0,1,0,1,1,1,1},
  {1,0,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,0,0,0,1},
  {1,0,1,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,0,1},
  {1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,0,1},
  {1,0,1,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1},
  {1,0,0,1,0,1,0,1,0,0,0,0,0,1,0,1,0,1,0,0,1},
  {1,0,1,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,1,0,1},
  {1,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,1},
  {1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1},
  {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}};

错误列表 Here is a link instead of posting it here since it's a lot of errors

Answer 1

您不能在声明中指定数组的大小。如果您删除大小整数，它将编译。但是，当您这样声明变量时，您应该始终将括号放在变量的类型上，而不是放在变量本身上:

int[][] board;

而不是:

int board[][];

如果您想创建一个具有特定大小的空白数组，那么您可以使用 new 运算符:

int[][] board = new int[21][21];

但是，如果您通过数组初始化定义数组，则永远不会指定大小

int[][] board = {{...}, ...};