code: public boolean save(DataOutputStream out)
      {
          try
          {
              out.writeInt(size);
              for (int i = 0; i < size; i++)
              {
                  out.writeInt(base[i]);
                  out.writeInt(check[i]);
              }
          }
          catch (Exception e)
          {
              return false;
          }
  
          return true;
      }
docs: 将base和check保存下来
  
  @param out
  @return