Writing a computer program that only does a single thing at a time is an artificial constraint that we've lived with in most programming languages. With Java, we no longer have to live with this limitation. Support for multiple, synchronized threads is built directly into the Java language and runtime environment.

Synchronized threads are extremely useful in creating distributed, network-aware applications. Such an application may be communicating with a remote server in one thread while interacting with a user in a different thread.

Thread Basics

The Thread Classes

Creating Threads

Scheduling & Thread Priority

Daemons

Grouping Threads

Thread States: New, Runnable, Not Running, Dead

Synchronization