Catching and throwing standard exception types >捕捉和引发标准异常类型
2.
Implement standard exception constructors 实现标准异常构造函数
3.
Standard exception names are built - in identifiers ( not reserved keywords ) 标准异常名是内置的标识（没有保留关键字） 。
4.
There can be application - specific exceptions in addition to this standard exception 可能有特定于应用程序的异常作为这个标准异常的补充。
5.
The following table hierarchically lists the standard exceptions provided by the runtime and the conditions under which you should create a derived class 下表按层次结构列出了运行库提供的标准异常以及派生类的创建条件。
