This document discusses how to create threads in Java. It shows that there are two main ways to create a thread: by implementing the Runnable interface and overriding the run() method, or by extending the Thread class and overriding the run() method. It also provides an example of how to create a multi-threaded server that uses a ServerSocket to listen for client connections on a fixed port, launches a new Service thread for each connection, and loops to continue accepting more connections.