Write a program that asks the user to enter two dates (in -MM-DD format), and then prints which date is earlier. Your program should print an error message if the user enters an invalid date (like 2019-15-99).

import java.util.*;

public class Dates {

   public static void main(String[] args) {

       String January,February, March, April, May, June, July,  

       August, September,October, November, December, month;

       January = February = March = April = May = June = July =  

               August = September = October = November = December = month = null;

       Scanner myScanner = new Scanner(System.in);  

       System.out.print("Enter date in the format mm/dd/: ");

       String input = myScanner.next();

       String months = input.substring(0,1);

       int monthInt = Integer.parseInt(months);

       if (monthInt == 01){

           month = January;

       }

       else if (monthInt == 02){

           month = February;

       }

       else if (monthInt == 03){

           month = March;

       }

       else if (monthInt == 04){

           month = April;

       }

       else if (monthInt == 05){

           month = May;

       }

       else if (monthInt == 06){

           month = June;