java - 迈耶在java中的实现继承

Question

谁能举个例子 Meyers Implementation inheritance在 Java 中，链接中的书是关于埃菲尔铁塔的，但我需要一个 Java 示例。

我知道java不支持多重继承，那我实现一个接口(interface)，扩展一个类，是不是可以称之为实现继承？

另外，实现继承是否必须有两个父类？

Answer 1

本书中的定义在这里进行了复述:

Definition: implementation inheritance Structural inheritance applies if B obtains from A a set of features (other than constant attributes and once functions) necessary to the implementation of the abstraction associated with B. Both A and B must be effective.

A 类和 B 类不得延期。当通过非抽象类 B 扩展非抽象 Java 类 A 时就是这种情况。

Definition: reification inheritance Reification inheritance applies if A represents a general kind of data structures, and B represents a partial or complete choice of implementation for that data structure. A is deferred; B may still be deferred, leaving room for further reification through its own heirs, or it may be effective.

类 A 是延迟的，因此在实现 Java 接口(interface) A 或扩展 Java 接口(interface) A(新接口(interface)将是 B)时会出现这种情况

您指定的情况(在 Java 中实现接口(interface)和扩展非抽象类)是这两者的组合。文字在这里说得很清楚:

A common case is what will be called the "marriage of convenience", based on multiple inheritance, where one parent provides the specification (reification inheritance) and the other the implementation (implementation inheritance).