(What is Mina? To participate in the test, one sentence is "a simple and easy-to-use Java framework based on tcp/ip communication". What? What is a framework? If you ask again, don't look down.
What can Mina do? Take it out for a while: We used it to make two small programs. One was sent to the server. After receiving the message from the client, it was sent back to the client; One is a simple client. Once connected to the server, it will send a message to arrive, and then send the message received from the server to the server. So, do you realize that this is an infinite cycle of c/s communication? Toss the machine is called, programming is to toss first!)
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