第三周实验

判断某一年份是否为闰年。（如果这个年份能被4整除，但不能被100整除；或者，如果这个年份能被4整除，又能被400整除；满足以上两个条件中的一个的年份为闰年）。

import java.util.Scanner;

public class LeapYear {

int nYear;
public LeapYear(int year)
{
nYear = year;
}
public Boolean isLeapYear()
{
Boolean b = false;
if( nYear%400==0 || (nYear%4==0 && nYear%100!=0) )
{
b = true;
}
return b;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner sc = new Scanner(System.in);

System.out.println("please input the year:(-1 end)");
int nYear = sc.nextInt();

while(nYear>=0)
{
LeapYear leap = new LeapYear(nYear);
Boolean b = leap.isLeapYear();
if(b==true)
System.out.println(nYear + " is Leap Year!");
else
System.out.println(nYear + " isn't Leap Year!");

System.out.println("please input the year:(-1 end)");
nYear = sc.nextInt();
}

sc.close();
}

}