Note that all of this is in the same VM; there's no remote calls, no mandatory exceptions, no arguments are being serialised; it's just one POJO talking to another POJO.

注意这些都是在同一个VM中发生的；没有远程调用，没有强制异常，没有参数被序列化；只是一个POJO与另一个POJO对话。

youdao

It can also check an incoming request and throw exceptions for any missing mandatory fields.

它还可以检查新来的请求并且抛出所有缺少强制字段的异常。

youdao

All are mandatory with few exceptions.

FORBES: Obama Care, The Supremes, and The Constitution