How to link phone and PC?

Question

Android

Good afternoon! I can’t find a clear and understandable instruction on how to connect a phone (smartphone on android 5.1) and a computer (laptop on windows) via wifi, preferably directly, without extraneous services. That is, I send a command to the PC, he immediately receives it, and vice versa. Like a chat. There is a router at home.
Prompt the literature or video lessons how to connect 2 devices, it is desirable that the code was on Java.

Answer 1

Either see how to work with ADB over wifi, which requires a number of gestures on the PC for each mobile device and for mobile devices (enabling debugging and other things), or look towards the tcp client / server. In Java, examples can be easily found.