java - 如何在嵌套循环中获取第一行和最后一列

Question

Scanner scanner = new Scanner(System.in);
        System.out.print("Masukkan nilai : ");
        int input = scanner.nextInt();
        int kolom = input -1;
            for(int i=1;i<input;i++){
                for(int j=input;j>i;j--){
                    System.out.print("*");
                }
                System.out.println();
            }

代码的输出是:

但我想要这样的输出:

所以我想我需要获取第一行和最后一列

如何做到这一点

Answer 1

请尝试这个

Scanner scanner = new Scanner(System.in);
System.out.print("Masukkan nilai : ");
int index = scanner.nextInt();

for (int i = 0; i < index; i++) {
    System.out.print("*");
}
System.out.println();

for (int i = 1; i < index; i++) {
    for (int j = index; j > i; j--) {
        if (j == index || j == i + 1) {
            System.out.print("*");
        } else {
            System.out.print(" ");
        }
    }
    System.out.println();
}