code: public long get() throws MemcachedException, InterruptedException, TimeoutException {
      Object result = this.memcachedClient.get(this.key);
      if (result == null) {
        throw new MemcachedClientException("key is not existed.");
      } else {
        if (result instanceof Long)
          return (Long) result;
        else
          return Long.valueOf(((String) result).trim());
      }
    }
docs: Get current value
  
  @return
  @throws MemcachedException
  @throws InterruptedException
  @throws TimeoutException