为什么界面在创建RMI应用程序中很重要？

Question

When we create RMI application in java do we have to create an interface first? Is an interface compulsory? Can we create RMI application without creating an interface? If not then why is the interface compulsory? What is the function of it? If anyone has code of Chatting in RMI without using remote interface then could you send that code to me?

Answer 1

RMI is about a client machine communicating with a server machine in such a special way that it seems from the programmer's perspective that you are invoking methods of an object which resides on the server.

Clearly, there is some network communicating "magic" going on behind the scenes, and the central programming paradigm which enables this separation of the "behind the scenes" action and the perception you get by reading client code is, well, interface .

From this line of reasoning you should be able to convince yourself that you not only cannot get around defining an interface , it is in fact the central concept around which everything else is built.

Answer 2

When we create RMI application in java do we have to create an interface first?

Yes.

Is an interface compulsory?

That's the same question, and the answer is also the same. Yes.

Can we create RMI application without creating an interface?

That's the same question for a third time, and the answer is still the same, although in the negative this time as you reversed your question.

If not then why is the interface compulsory?

Because that's how they designed it. If you didn't have a remote interface, you wouldn't have any API to call your remote methods with at the client.

What is the function of it?

That's the same question again, and the answer is also the same.

If anyone has code of Chatting in RMI without using remote interface then could you send that code to me?

That's not a proper request for this site. If there is such code, which there isn't, and can't be, it should be posted here as an answer. This is not a private help desk.