如何使用字符打印锯齿状数组？

Question

public static void main(String [] args) {
char[][]tictactoe= {{'#','#'},{'#','#','#','#','#'},{'#','#','#','#'}};
System.out.println(tictactoe);
}

我们希望它使用2d数组打印＃符号我做错了什么

Answer 1

这样做：

Select a.col1
     , a.col2
     , a.col3
from a
left
join b on a.col3=b.col3 and a.col4 = b.col4 and b.col5 = -- filter cindition
left
join c on c.col3 = b.col3 and c.col4 = b.col4 and c.col5 = filter condition and c.col6 = -- extra conditions

Answer 2

您必须使用循环：

char[][]tictactoe= {{'#','#'},{'#','#','#','#','#'},{'#','#','#','#'}};

StringJoiner sj = new StringJoiner(", ", "[", "]");
for(char[] arr : tictactoe)
    sj.add(Arrays.toString(arr));
System.out.println(sj.toString());

输出：

[[#, #], [#, #, #, #, #], [#, #, #, #]]