An interesting functionality offered by the concurrency API of Java is the ability to group threads. This allows us to treat the threads of a group as a single unit and provide access to the thread objects that belong to a group in order to do an operation with them. For example, you have some threads doing the same task and you want to control them. You can, for example, interrupt all the threads of the group with a single call.
Java provides the ThreadGroup class to work with a groups of threads. A ThreadGroup object can be formed by thread objects and another ThreadGroup object, generating a tree structure of threads.
In the Controlling the interruption of a ...
