How to connect to wifi devices using Java? [closed]

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How to establish connection in Java between devices within wifi range?

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To establish a connection between two devices over a network (WiFi, cable, etc...) you need to write 2 pieces of software:

1) A server: which waits for connections

2) A client: which initiates a connection to the server

Once the client initiates a TCP connection then the devices are connected and you can send data and messages between them.

Here: Java Sockets

Here's a COMPLETE step by step tutorial on how to write a chat application: Client/Server Pair