When to choose checked and unchecked exceptions

Question

In Java (or any other language with checked exceptions), when creating your own exception class, how do you decide whether it should be checked or unchecked?

My inst

Answer 1

The rule I use is: never use unchecked exceptions! (or when you don't see any way around it)

From the point of view of the developer using your library or the end-user using your library/application it really sucks to be confronted with an application that crashes due to an uncought exception. And counting on a catch-all is no good either.

This way the end user can still be presented with an error message, instead of the application completely disappearing.