here asks:
There are many well-known best practices about exception handling in isolation. I know the "do's and don'ts" well enough, but things get complicated when it comes to best practices or patterns in larger environments. "Throw early, catch late" — I've heard many times and it still confuses me.
Why should I throw early and catch late, if at a low-level-layer a null pointer exception is thrown? Why should I catch it at a higher layer? It doesn't make sense for me to catch a low-level exception at a higher level, such as a business layer. It seems to violate concerns of each layer.
