java判断闰年：
package week1;
import java.util.Scanner;
public class test3 {

public static void main(String[] args)
{
System.out.println("请输入一个任意年份");
Scanner sc=new Scanner(System.in);
int year=sc.nextInt();
if((year%4==0&&year%100!=0)||year%400==0)
{
System.out.println(year+"是闰年");
}else
{
System.out.println(year+"不是闰年");
}
}
}