We don't start a thread ( as a separate task ) by invoking the run method directly on the thread object. We invoke the start() method on the thread object. The start() method is in the Thread class and it invokes the run() method we override in our implementation.
Try invoking the start method on your thread object and see what output you get?
Edit : Since you have invoked run method directly, you have effectively not started a new thread and hence the thread that is executing the run() method is still the main thread. A thread ( a separate task ) begins when you invoke the start method on the thread object.