Your exception hierarchy should begin with something fairly robust and generic, like ApplicationException.

异常层次结构应该从一些十分健壮而又通用的异常入手，如ApplicationException。

youdao

The answer is to provide a more useful type of exception that also contains a lower-level exception. Listing 1 shows a simple ApplicationException that does just this

答案是提供一类更有用的异常，它还包含低级异常。

youdao

The answer is to provide a more useful type of exception that also contains a lower-level exception. Listing 1 shows a simple ApplicationException that does just this

答案是提供一类更有用的异常，它还包含低级异常。

youdao