Java unreachable catch block compiler error

Question

Why in Java can we catch an Exception even if it is not thrown, but we can\'t catch it\'s subclass (except for \"unchecked\" RuntimeExceptions and

Answer 1

IO Exceptions can only be caught if the compiler predicts that there might be something in the code that throws IOException. So you are getting a warning that IO exception is never thrown from the try statement body (since there is nothing in the body of try).