在Java中嵌套有for循环的Diamond

在您的第一个for循环中，删除=标记，然后使用<例如

for (int i = 1; i < size; i += 2)

完整代码

    int size = 9;    for (int i = 1; i < size; i += 2) {        for (int k = size; k >= i; k -= 2) { System.out.print(" ");        }        for (int j = 1; j <= i; j++) { System.out.print("*");        }        System.out.println();    }// end loop    for (int i = 1; i <= size; i += 2) {        for (int k = 1; k <= i; k += 2) { System.out.print(" ");        }        for (int j = size; j >= i; j--) { System.out.print("*");        }        System.out.println();    }// end loop