[JAVA] Problème de date

import java.util.*; 
import java.io.*; 
import java.text.*; 

public class Test{ 
  
 public static void main(String[] args){ 
    
  String filePath = "Date.txt"; 
  PrintWriter ficOut; 
  int jours = 0; 
    
  String format = "mm"; 
  SimpleDateFormat formater = new java.text.SimpleDateFormat( format ); 
  Date date = new Date(); 
  String a = formater.format(date); 
  int i = Integer.parseInt(a); 
  System.out.println(i); 
   
  try{ 
   BufferedReader in = new BufferedReader(new FileReader(filePath)); 
   ficOut = new PrintWriter(new BufferedWriter(new FileWriter(filePath))); 
    
   try{ 
    String line; 
    while((line = in.readLine()) != null){ 
     System.out.println(line); 
     int b = Integer.parseInt(line); 
     if(b < i){ 
      jours++; 
     } 
    } 
    System.out.println(jours); 
    in.close(); 
    ficOut.write(a); 
    ficOut.close(); 
   } 
   catch(IOException e){ 
    System.out.println(e.getMessage()); 
    System.exit(1); 
   } 
  } 
  catch(IOException e){ 
   System.out.println(e.getMessage()); 
   System.exit(1); 
  } 
 } 
}