在Java中计算多年即闰年

Question

键入结束年度：2013

2008年是闰年

2012年是闰年

非常感谢您的回复！帮助我学到了比我的讲师实际教的更多的东西：）

import java.util.Scanner;
public class LeapYears
{
public static void main (String [] args)
{
Scanner keyboard = new Scanner (System.in); 

System.out.println ("This program tests whether a given " + "year is a leap year.");

    System.out.print ("Type the starting year: ");
    int year = keyboard.nextInt ();

    System.out.print ("Type the ending year: ");
    int EndYear = keyboard.nextInt ();

if (((year%4 == 0) && (year%100 != 0)) || (year%400 == 0)) 

System.out.println (year + " is a leap year.");
    else
        System.out.println (year + " is not a leap year.");

} 
} 

Answer 1

您可以简单地将闰年计算代码包装在一个方法中，并在一个循环中调用它，例如：

public boolean isLeapYear(int year){
   if (((year%4 == 0) && (year%100 != 0)) || (year%400 == 0)) 
       return true;
   else 
       return false;
} 

在您的主要方法中：

System.out.print("Type the starting year: ");
int startYear = keyboard.nextInt();

System.out.print("Type the ending year: ");
int endYear = keyboard.nextInt();

for(int currentYear=startYear;currentYear++;currentYear<=endYear){
    if(isLeapYear(currentYear))
       System.out.println(currentYear + " is a leap year.");
    else
       System.out.println(currentYear + " is not a leap year.");
}

除此之外，最好为用户输入不是整数、开始年大于结束年等情况添加一些防御性代码。