发送未知类的Java对象 [英] Sending Java object of an unknown class

问题描述

搜索了很长时间，但没有找到答案。

searching for a long time, but didn't find any answer on that one:

我有一个服务器，有一个客户端。服务器应该通过 ObjectInputStream 和 ObjectOutputStream 接收对象。这对于服务器上已知的任何 class 已经有效。
现在，我想发送服务器不知道的类的 Object 。他只知道该类的接口。那显然失败了……

I have a server and I have a client. The server should receive an object via ObjectInputStream and ObjectOutputStream. That already works for any class, known on the server. Now I want to send an Object of a class the server doesn't know. He only knows the interface of that class. And that obviously fails...

如何避免 ClassNotFoundException ？我以为接口就是解决方案。我只想访问通过接口知道的功能，但是Java还是想拥有该类。

How can I avoid the ClassNotFoundException? I thought interfaces were the solution. I only want to access the functions I know by the interface, but Java wants to have the class anyway.

谢谢。

推荐答案

没有办法。为了能够在对象上执行方法，您需要具有对象具体类的字节码。其界面还不够。

There is no way. To be able to execute a method on an object, you need to have the byte-code of the concrete class of the object. Its interface isn't sufficient.

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