什么是"扔"

任何人都可以解释我使用抛出异常处理？抛出异常会发生什么？

这意味着"引发"异常.当你"抛出"异常时,你会说"出了问题,这里有一些细节".

然后,您可以"捕获""抛出"异常,以使您的程序优雅地降级而不是错误和死亡.

"抛出"异常是触发整个异常处理过程的原因.

在正常执行过程中,程序中的行以循环和分支顺序执行.当发生某种错误时,会创建一个异常然后抛出异常.

抛出的异常将修改程序中的常规操作顺序,使得在某个"catch"块内处理异常之前不会执行"正常"指令.一旦在catch块中捕获到异常,并且执行该catch块中的代码("处理"异常),正常的程序执行将在catch块之后立即恢复.

// Do some stuff, an exception thrown here won't be caught.
try
{
  // Do stuff
  throw new InvalidOperationException("Some state was invalid.");
  // Nothing here will be executed because the exception has been thrown
}
catch(InvalidOperationException ex) // Catch and handle the exception
{
  // This code is responsible for dealing with the error condition
  //   that prompted the exception to be thrown.  We choose to name
  //   the exception "ex" in this block.
}
// This code will continue to execute as usual because the exception
//   has been handled.