java - 删除末尾的多余空间

Question

我是用 Java 编写的，我希望输出在除最后一个值之外的每个值之后都创建一个空格。我如何让它显示为 1[]2[]3[]4[]5[]6[]7 而不是 1[]2[]3[]4 []5[]6[]7[] ?

这是我的代码!

public class Pentagonal {
    public static void main(String[] args) {
        int n, x, n1;

        Scanner input = new Scanner(System.in);
        System.out.print("Enter an integer: ");
        n = input.nextInt();

        n1 = 1;

        System.out.print("The pentagonal numbers are: ");

        while (n1 <= n) {
            x = (3 * n1 * n1 - n1) / 2;
            if (n1 == n)
                System.out.print(x);
            else
                System.out.print(x + " ");
            n1++;
        }
    }
}

Answer 1

您的代码完全没问题。我认为没有问题。看看这个

 while (n1 <= n) {
    x = (3 * n1 * n1 - n1) / 2;
    System.out.print(x + ((n1 == n) ? "\n" : " "));
    n1++;
}

如果需要，请将此 "\n"(新行)替换为 ""(空格)!