public class LogInfo {
   private static final SimpleDateFormat sdf = new SimpleDateFormat ("yyyyMMdd");

   public logInfo (
   }
}

public class LogInfo {
     private static final SimpleDateFormat sdf = initializeSimpleDateFormat();
     private static SimpleDateFormat initializeSimpleDateFormat(){
                return sdf == null ? new SimpleDateFormat("yyyy/MM/dd") : sdf;
     }
     public logInfo (
     }
}