java问题判断闰年

源代码

import java.util.*;

public class MoreLeapYear {

public static void main(String[] args)
{
int year;
String another = "y";
Scanner scan= new Scanner(System.in);
System.out.println("please enter a year!");
year = scan.nextInt();

while (another.equalsIgnoreCase("y"))
{
if(year<1582)
System.out.println("sorry! there is no Solar calendar at that time!");
else
{
if(year%4==0&&year%100!=0||year%100==0&&year%400==0)
System.out.println("this year is a leap year!");
else
System.out.println("this year is not a leap year!");
}

System.out.println();

System.out.print("Test another year?(y/n) ");
another = scan.nextLine();
}

}
}
最后面无法输入y进行重复测试。求高人解释，谢谢。。

对代码修改了两处:

1)System.out.println("please enter a year!");
year = scan.nextInt();
将这两行代码放到了while循环里,因为你的year要一直接受值,而不是一次,放到外面就接受不到了,至于上面那一行,是为了程序和人的交互好一点.

2)another = scan.nextLine();
将最后一行代码改成了another = scan.next();nextLine就不是这么用了,这里用next()就可以解决问题.

修改后的代码如下:

public static void main(String[] args)
{
int year;
String another = "y";
Scanner scan= new Scanner(System.in);

while (another.equalsIgnoreCase("y"))
{
System.out.println("please enter a year!");
year = scan.nextInt();
if(year<1582){
System.out.println("sorry! there is no Solar calendar at that time!");
}
else
{
if(year%4==0&&year%100!=0||year%100==0&&year%400==0){
System.out.println("this year is a leap year!");
}
else{
System.out.println("this year is not a leap year!");
}
}

System.out.println("Test another year?(y/n) ");
another = scan.next();
}

}

import java.util.*; public class bijiao { public static void main(string[] args) { system.out.println("请输入年份："); scanner sc=new scanner(system.in); int year=sc.nextint(); //输入年份 if(runnian(year)) { system.out.println(year+"年是闰年"); } else { system.out.println(year+"年不是闰年"); int p=year; while(!runnian(p-1)) { p--; } system.out.println(year+"年之前的闰年是"+(p-1)); p=year; while(!runnian(p+1)) { p++; } system.out.println(year+"年之后的闰年是"+(p+1)); } } static boolean runnian(int year)//判断是否为闰年的方法 { boolean t=false; if(year%4==0) { if(year%100!=0) { t=true; } else if(year%400==0) { t=true; } } return t; } }