Miscellany

public boolean deleteBox(Long id){                        Boxes box = entityManager.find(Boxes.class, id);             if(box != null){                  try {                    entityManager.remove(box);                    return true;                  }                  catch(IllegalArgumentException e) {                      System.out.println(e);                      return false;                  }                  catch(TransactionRequiredException e) {                      System.out.println(e);                      return false;                  }                              }else{                 return false;             }                     }