Ikk：新頁面: Which Three statements are true? (Choose Three.) A. A final method in class X can be abstract if and only if X is abstract. B. A protected method in class X can be overridden by a...

2013-03-30T06:01:23Z

新頁面: Which Three statements are true? (Choose Three.) A. A final method in class X can be abstract if and only if X is abstract. B. A protected method in class X can be overridden by a...

新頁面

Which Three statements are true? (Choose Three.)
A. A final method in class X can be abstract if and only if X is abstract.
B. A protected method in class X can be overridden by any subclass of X.
C. A private static method can be called only within other static methods in class X.
D. A non-static public final method in class X can be overridden in any subclass of X.
E. A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
F. A method with the same signature as a private final method in class X can be implemented in a subclass of X.
G. A protected method in class X can be overridden by a subclass of X
only if the subclass is in the same package as X.

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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: B E F </span>

<span style="font-size:medium;"> 解說:
那三個敘述是正確的？
A protected method in class X can be overridden by any subclass of X.
一個在類別X中的protected方法可以被X的任意子類別覆寫

A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
在類別X中的公開靜態方法可以在類別X的子類別中被呼叫，不需要明確地參考類別X

A method with the same signature as a private final method in class X can be implemented in a subclass of X.
類別X中一個私有的finale方法可以在類別X的子類別中被實作出來(這表示這個私有的final方法是抽象的)

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{{SCJP 1.6版考題講解}}

SCJP 1.6版考題 088 - 修訂歷史

Ikk：新頁面: Which Three statements are true? (Choose Three.) A. A final method in class X can be abstract if and only if X is abstract. B. A protected method in class X can be overridden by a...