Install libnetty-3.9-java by entering the following commands in the terminal:
sudo apt update sudo apt install libnetty-3.9-java
Description:
Java NIO client/server socket framework
Netty is a Java NIO client/server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.
Homepage: http://www.netty.io/
Version: 3.9.9.Final-1
Section: universe/java