java - 通过接受字符串使用 for 循环打印模式

Question

示例输入字符串:

bluej

输出:

b***b
*l*l*
**u**
*e*e*
j***j

(其中“*”表示空格)

到目前为止我已经做了这么多:

int n = s.length() - 1;
int i, j;
for (i = 0; i <= n; i++) {
    for (j = 0; j <= (n + 1); j++) {
        if (i == j || i == n - (j - 1))
            System.out.print(s.charAt(i));
        else {
            System.out.print("*");
        }
    }
    System.out.println();
}

但输出是:

b****b
*l**l*
**uu**
**ee**
*j**j*

Answer 1

只需替换 i == n-(j-1)与 i == n - j第二个 for 循环 for (j = 0; j <= n+1; j++)至for (j = 0; j <= n; j++) :

int n = s.length() - 1;
int i, j;
for (i = 0; i <= n; i++) {
    for (j = 0; j <= n; j++) {
        if (i == j || i == n - j)
            System.out.print(s.charAt(i));
        else {
            System.out.print("*");
        }
    }
    System.out.println();
}