Determines if any year past 1581 is a leap year or not.

LeapUpdate.java

import java.util.Scanner;
public class Leap{
 
     public static void main(String []args){
        int year,play;
        
        System.out.println("[1] Enter year\n[2] Quit");
        
        Scanner scan = new Scanner(System.in);
        
        play = scan.nextInt();
        while (play <= 2){
        if (play == 1) {
        	System.out.println ("Enter year:");
  
       		year = scan.nextInt();
        
        	if (year < 1582){
            		System.out.println ("Enter a number greater than 1581");
       		} else if (year >= 1582 && year % 4 >= 1) {
            		System.out.println ("Not a leap year");
        	}
        
        	if (year >= 1582 && year % 4 == 0 && year % 100 >= 1) {
            		System.out.println ("Leap Year");
        	}
        
        	if (year >= 1582 && year % 4 == 0 && year % 100 == 0 && year % 400 >= 1){
            		System.out.println ("Not a leap year");
        	} else if (year >= 1582 && year % 4 == 0 && year % 100 == 0 && year % 400 == 0){
            		System.out.println ("Leap Year");
        	}
        } else if (play == 2) {
        	System.exit(1);
        }
        	System.out.println("[1] Enter year\n[2] Quit");
        	play = scan.nextInt();
        }
       
     }
     
}

LeapYear.java

import java.util.Scanner;
public class Leap{

     public static void main(String []args){
        int year;
        
        Scanner scan = new Scanner(System.in);
        
        year = scan.nextInt();
        
        if (year < 1582){
            System.out.print ("Enter a number greater than 1581");
        } else if (year % 4 >= 1) {
            System.out.println ("Not a leap year");
        }
        
        if (year % 4 == 0 && year % 100 >= 1) {
            System.out.println ("Leap Year");
        }
        
        if (year % 4 == 0 && year % 100 == 0 && year % 400 >= 1){
            System.out.println ("Not a leap year");
        } else if (year % 4 == 0 && year % 100 == 0 && year % 400 == 0){
            System.out.println ("Leap Year");
        }
        
     }
     
}