Trying to modify class so when toString method returns in different format than given

So I'm trying to get a return in the format "month number, number" ex. February 11, 2012. In the beginning I enter all in numbers. I'm stumped on where to begin. Should I create an string array ?

Code Java:

public class DaysBetween
{
  public static void main(String[] args)
  {
 
    Scanner conIn = new Scanner(System.in);
    int day, month, year;
    boolean cont = true;
    String input;
    do	// Added do while loop, so user gets asked if he wants to repeat operation.
    {
    	    System.out.println("Enter two 'modern' dates: month day year");
    		System.out.println("For example, January 12, 1954, would be: 1 12 1954");
    		System.out.println();
    		System.out.println("Modern dates occur after " + Date.MINYEAR + ".");
    		System.out.println();
 
    		System.out.println("Enter the first date:");
    		if(conIn.hasNextInt())
    		{
    				month = conIn.nextInt();
	 				day = conIn.nextInt();
    				year = conIn.nextInt();
    				Date date1 = new Date(month, day, year);
 
    		}
    			else
    			{
    				conIn.next();
    				System.out.print("Illegal input was entered. ");
    				return;
    			}
 
 
    		System.out.println("Enter the second date:");
    			month = conIn.nextInt();
    			day = conIn.nextInt();
    			year = conIn.nextInt();
    		Date date2 = new Date(month, day, year);
 
 
 
    	if  ((date1.getYear() <= Date.MINYEAR) /////Cannot find symbol
	    		||
		 	(date2.getYear() <= Date.MINYEAR))
      		System.out.println("You entered a 'pre-modern' date.");
    	else
    		{
      			System.out.println("The number of days between");
      			System.out.print(date1); /////Cannot find symbol
      			System.out.print(" and ");
      			System.out.print(date2);
      			System.out.print(" is ");
      			System.out.println(Math.abs(date1.lilian() - date2.lilian()));///Cannot find symbol
      			System.out.print("and it has been ");
      			System.out.print(Math.abs(date2.mjd())); // Added to print days between now and Nov 17, 1858.
      			System.out.println(" days since November 17, 1858");
      			System.out.print("and it has been ");
      			System.out.print(Math.abs(date2.djd())); // Added to print days between now and Jan 1, 1900.
      			System.out.println(" days since January 1, 1900");
      			System.out.print("Do you want to continue? (Y/N): "); // Added to ask user if they want to continue.
 
    		}
    }
    while ("Y".equalsIgnoreCase(conIn.next().trim())); //Added so if user enters "yes" program will start over.
 }
}

Edit: I have figured out the problem with my toString method, but have encountered another problem. I am supposed to verify that the input are integers and if not, I'm supposed to tell user "wrong input" and close. I thought I can put a if-else statment, but when I build I get an error "Cannot find symbol" refering to date1 in the 2nd "if" statement. Any clue on what I'm doing wrong?