About Question enthuware.ocpjp.v17.2.3706 :

[Badem48]

Hi,

I think this is a good question, but I am curious: Do we need to memorize which I/O Stream class method throws which exception?

[admin]

Not for all classes but for serialization, yes, you need to know that it may throw a ClassCastException. This is actually quite relevant to deserialization. ClassCastException needs to be handled separately because it doesn't extend IOException.