java - 父类(super class)中的私有(private)final可以被覆盖吗？

Question

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.

这个问题来自 SCJP。答案是 BEF

我理解 BE，但 F 说该方法是“私有(private)最终”，那么子类如何覆盖该方法，因为它定义为最终和私有(private)方法。

请清除F点。

Answer 1

答案 F 不是覆盖的示例，而是方法范围的示例。在类中声明为 private 的方法对该类的子类不可见，因此不存在重叠；子类在父类(super class)中看不到它可以重写的方法。子类有自己的方法 void foo(int)，完全不知道父类(super class)的 private void foo(int)。