Lifecycle

A new thread is in the "New Thread" state. It is no running.
Thread starts running when its start() method is called. A call to this method results in the creation of an execution context for the thread and a call to the thread's run method.
Threads do not actually run in parallel (only one CPU). They are schedule by the VM's scheduler.
Thread that are in the Runnable state can be called on to run.
A thread will enter the not Runnable state if it calls sleep, wait, or is blocking on I/O.
A thread must stop itself. That is, the run method must return. An external stop has to be "soft", as in previous slide.
The isAlive method return true if the thread is in either the Runnable or "not Runnable" states.