Java implements a simple chat room program based on UDP protocol

I've been relatively idle recently. I've been taking the time to review some technical applications in Java. Nothing to do today. I wrote a very simple chat room program based on UDP protocol. Socket is rarely used in current work, which is a simple memory of Java network programming.

Let's see the effect first:

The implementation effect can be said to be very, very simple, but you can simply see an implementation principle. The users of "chat room 001", Xiaohong and Xiaolv chatted with each other, and Xiaohei of "chat room 002" was ignored and lonely.

Take a look at the code implementation:

1. The first is the implementation of the message server. The function is very simple: • register the information of the client (which chat room you entered, etc.); • construct a UDP protocol socket object to accept the messages sent by each client; • analyze the message content and push the chat information back to each client of the corresponding chat room;

2. The client program is still very simple:

• simply define the client chat room interface. • Construct a message sending socket object. • Get the content of the chat information box and send it to the server.

3. Message entity class is mainly used to encapsulate messages into objects, including chat room ID, message sender nickname and message content. Parsing using JSON format.

4. OK, it's basically done here. Create a test class.

• turn on the message server Open three clients, two of which enter "chat room 001" and the other into "chat room 002".

The above is the whole content of this article. I hope it will be helpful to your study, and I hope you can support programming tips.