第19題SampleCode

Which Man class properly represents the relationship "Man has a best friend who is a Dog"?

A. class Man extends Dog{}
B. class Man implements Dog{}
C. class Man{private BestFriend dog;}
D. class Man{private Dog bestFriend;}
E. class Man{private Dog;}
F. class Man{private BestFriend;}

答案：D

參考：6-5 繼承

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