Implemented Runnable and Thread example
Refactored names

Refactored HelloRunnable to RunnableExample
and HelloThread to ThreadExample
Implemented Thread.sleep(milliseconds) example

Implemented Thread.sleep(milliseconds) example
Refactored name

Refactored SleepingThread into SleepingThreadExample
Implemented interruptible Thread example

Implemented interruptible Thread example
Implemented Thread join() example

Implemented Thread join() example
Created a simple Clock and Timer example using Threads

Created a simple Clock and Timer example using Threads