使用throw和throws 引发异常 不常见的关键字：strictfp，transient, volatile

https://baijiahao.baidu.com/s?id=1596997196553236037&wfr=spider&for=pc

 

https://blog.csdn.net/basenet855x/article/details/6691040

 

https://www.cnblogs.com/zhengbin/p/5654805.html