Java - 在 For 循环中的十个值后打印新行

Java - Printing new line after ten values in a For loop

我一直在尝试制作一个简单的程序来打印出 2 个输入年份之间的闰年。我做了一个循环,每年检查它是否是闰年,然后打印它,但我希望每行只能显示 10 年,而不仅仅是在一条长线上显示所有年份。

像这样:

    1004, 1008, 1012, 1016, 1020, 1024, 1028, 1032, 1036, 1040,
    1044, 1048, 1052, 1056, 1060, 1064, 1068, 1072, 1076, 1080,
    1084, 1088, 1092, 1096, 1104, 1108, 1112, 1116, 1120, 1124,
    1128, 1132, 1136, 1140, 1144, 1148, 1152, 1156, 1160, 1164,
    1168, 1172, 1176, 1180, 1184, 1188, 1192, 1196, 1200.

而不是这个:

1004, 1008, 1012, 1016, 1020, 1024, 1028, 1032, 1036, 1040, 1044, 1048, 1052... 

我尝试了各种不同的方法来实现这一点,嵌套 for 循环等,但目前我似乎无法实现。很抱歉,如果这是一个简单答案的愚蠢问题,我根本没有学习 Java 很长时间。

到目前为止,这是我的代码,它将所有年份打印在一行中:

import java.util.Scanner;

public class LeapYears {

    public static void main(String[] args) 
    {
        int firstY, finalY;
        Scanner kb = new Scanner(System.in);

        System.out.print("Enter start year: ");
        firstY = kb.nextInt();

        System.out.print("Enter end year: ");
        finalY = kb.nextInt();

        for(; firstY <= finalY; firstY++) {
            if ((firstY % 4) == 0) {
                if ((firstY % 100) == 0) {
                    if ((firstY % 400) == 0 ) {
                        System.out.print(firstY + ", ");
                        firstY++;
                    }
                } else {
                    System.out.print(firstY + ", ");
                }
            }
        }
    }
}

使用外部计数器(例如 int printed = 0)来记录您已经打印了多少个数字。检查你的内部循环是否 printed % 10 == 0 并在这种情况下调用 System.out.println()

您可以使用计数器来跟踪循环

int counter =0;
for(; firstY <= finalY; firstY++)

    {
        if ((firstY % 4) == 0)

        {
            if ((firstY % 100) == 0)

            {
                if ((firstY % 400) == 0 )

                {
                    if(counter==10) {
                         System.out.println("");
                    }
                    System.out.print(firstY + ", ");
                    firstY++;
                    counter++;

                }
            }

            else
            {
                System.out.print(firstY + ", ");
                counter++;
            }

        }
    }

这就是我会做的。只需添加一个 int 计数器变量,每次打印一年时递增它。当它达到 10 的倍数时,只需打印一个新行。

import java.util.Scanner;

public class LeapYears 
{

public static void main(String[] args) 
{
    int firstY, finalY, counter;
    counter = 0;
    Scanner kb = new Scanner(System.in);

    System.out.print("Enter start year: ");
    firstY = kb.nextInt();

    System.out.print("Enter end year: ");
    finalY = kb.nextInt();



    for(; firstY <= finalY; firstY++)

    {
        if ((firstY % 4) == 0)

        {
            if ((firstY % 100) == 0)

            {
                if ((firstY % 400) == 0 )

                {
                    System.out.print(firstY + ", ");
                    firstY++;
                    counter++;
                    if (counter % 10 == 0) System.out.println("");
                }
            }

            else
            {
                System.out.print(firstY + ", ");
            }

        }
    }

}
}

你可以这样做。

int count = 0;
for(; startYear <= endYear; startYear++) {
 System.out.print(startYear + ", ");
 count++;
 if(count == 10) {
  count = 0;
  System.out.println();
 }
}