Java中继承的坏例子是什么？ [英] What can be the bad example of inheritance in Java?

问题描述

我知道Java中继承的优点，但我有点难以接受它也有缺点。任何人都可以在Java中给我一个糟糕的继承示例吗？

I know the advantages of inheritance in Java, but it is somewhat difficult for me to accept that it has disadvantages too. Can anybody give me a bad example of inheritance in Java?

推荐答案

• Stack扩展了Vector 。堆栈不是矢量。


• 属性扩展Hashtable 。属性表不是哈希表。


• Stack extends Vector. A stack is not a vector.
• Properties extends Hashtable. A table of properties is not a hash table.

参见这个答案来自Effective Java的报价。

See this answer for a quote from Effective Java.

这很容易使用已经在 Vector 中实现的内容编写 Stack 实现（同样用于属性），但它产生了问题 - 见这里

It was easy to write the Stack implementation by using what is already implemented in Vector (likewise for Properties), but it created problems - see here

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