They do cause issues when you need to implement an interface which doesn't declare the exception but you have a checked exception which can't be handled at that

They do cause issues when you need to implement an interface which doesn't declare the exception but you have a checked exception which can't be handled at that point. Only real option then is to rethrow as an unchecked exception. For example an Iterator which may have an IOexception. I still like them, but they aren't a panacea, at least as Java implements them.