What libraries are there for data exchange between client and server in java?

Question

Java

I am writing a game in which data is exchanged between the client and the server. The data contains the objects, their location, and so on. The server and client can run on the same machine. It is necessary that would work between two jar applications.

Answer 1

Retrofit is a type-safe HTTP client for Android and Java.
Article on Habré Learning Retrofit 2

Answer 2

try websocket