Java array_name [0] .length函数错误？

Question

char[][] board = {
            {'#','#','#','-','@','-','#','#','#'},
            {'#','#','-','@','@','@','-','#','#'},
            {'#','-','@','@','-','@','@','-','#'},
            {'-','@','@','@','@','@','@','@','-'}};

System.out.println(String.format("Rows: %o, Columns: %o", board.length, board[0].length));

由于某种原因，Java输出11列。感谢任何帮助。

Answer 1

使用%d，而不是%o。 %o将以八进制显示结果。八进制11等于十进制9。