About Question enthuware.ocpjp.v11.2.3660 :
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About Question enthuware.ocpjp.v11.2.3660 :
Last answer do not throw NPE, this option do not compile. If methot Collectirs.grouppingBy() takes first parameter - movie -> Optional.of(movie.getGenre()) then it will throw NPE
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Re: About Question enthuware.ocpjp.v11.2.3660 :
You are right. Fixed.
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