与仅在 try 语句之后编写代码相比，finally 块是什么？

Question

In other words, how are these two different?

try
{
    // Something that can throw an error
}
catch
{
    // Handle the error
}
finally
{
    // Something that runs after the try statement
}

vs.

try
{
    // Something that can throw an error
}
catch
{
    // Handle the error
}
// Something that runs after the try statement

Answer 1

finally block always executes.

You can be sure, that this block will be executed no matter what.

Literally it is something like:

Try something, catch some exceptions(if told to and if they are there) and execute the finally block finally.

Answer 2

If there is a break in the try block or an exception, it may cause the program to halt. In cases like these code that is mandarory to be executed, like closing open connections and returning items to the connection pools are writen in the finally block. The finally block ensures that the code written inside it will be executed.

Answer 3

If you only ever use general catches (ie catch without args or catch(Exception ex) ), whether to put code in finally or after try/catch is basically a stylistic choice, as both a finally block and code after a try/catch will execute in any situation (barring deliberate escape mechanisms such as return ).

However, if you use a narrow catch , and the exception isn't caught, what will happen is the finally block will still execute, however the code after the try/catch won't.