Java Date DateFormat String DAY_OF_MONTH

import java.util.*;
import java.io.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParseException;


class MyDate {
    public static void main(String args[]) throws Exception {
        DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
        DateFormat fdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       
        java.util.Date billMonth = new Date();
        System.out.println(fdf.format(billMonth));
        Calendar cld = Calendar.getInstance();
        cld.setTime(billMonth);
        cld.add(Calendar.MONTH, 1); // Calendar.MONTH = 2
       
        System.out.println("1 month later: \n" + fdf.format(cld.getTime()));
       
       
       
        try {
            Date myday = df.parse("10/10/2010");
            System.out.println(fdf.format(myday));
        } catch (ParseException e) {
            e.printStackTrace();
        }
       
       
      int month = new Date().getMonth() + 1, year = new Date().getYear() + 1900;
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      try {
           System.out.print("Enter month: ");
         month = Integer.valueOf(br.readLine());
         System.out.print("Enter year: ");
         year = Integer.valueOf(br.readLine());
      } catch (IOException ioe) {
         System.out.println("IO error trying to read your name!");
         System.exit(1);
      }

    Date myday = df.parse("1/" +String.valueOf(month)+ "/" +     String.valueOf(year));
    cld.setTime(myday);
   
    System.out.println(String.valueOf(myday.getMonth() + 1)+ "/" +     String.valueOf(myday.getYear() + 1900) + ": has " + String.valueOf(cld.getActualMaximum(Calendar.DAY_OF_MONTH)) + " days");
   }
}