相关疑难解决方法(0)

捕获异常而不是进行检查时,try-catch需要多长时间(以纳秒为单位)(假设消息具有HashMap类型的查找性能)？

    try {
        timestamp = message.getLongField( MessageField.TIMESTAMP );
    } catch (MissingDataException e) {
        //Not all messages contain this field
    }

VS

if (message.contains(MessageField.TIMESTAMP))
    timestamp = message.getLongField( MessageField.TIMESTAMP );