Why can't we call the start method twice on a same instance of the Thread object?

Question

I was reading about threads and found that we can\'t call the start method twice on the same thread instance. But I didn\'t understand the exact reason for the same. So why

Answer 1

according to thread life cycle, once thread is 'dead' you can not restart it.You only can start new thread invoking start() method.

Thread can be bought to Running state from Runnable state not from Dead state.