creating our own unchecked Exceptions

[Raj Kumar Bindal]

When we create user defined exceptions,those are checked exceptions.Is there any way through which we can create user defined unchecked exceptions.

[Rob Spoor]

Extend RuntimeException or a subclass of RuntimeException, instead of Exception or a subclass of Exception.

[Raj Kumar Bindal]

Thanks Rob.but i don't see any usage of making user defined unchecked exceptions.Can you tell me some scenario where user defined unchecked exceptions are helpful.