A Thread has the following life cycles states
1.New/Born state:When a thread is just instantiated we say 
that the thread is in born state.now it can not compete for 
CPU cycles.
2.Active state:When we call the start() on thread object a 
thread moves from born state to active state.Here the code 
associated with run() will be executed.
3.Blocked state:When the thread is temporarily keep out of 
ready queue,we say that the thread is in blocked state. In 
this state it can't compete for CPU cycles.
4.Dead state:When the thread execution is completed or 
forcibly terminate the thread, it will be moved to dead 
state.

When an object is created using Thread class,it is in the 
new state, when the start method is called the object goes 
into the runnable state from where the scheduler picks up 
and starts executing. If that process requires any resource 
it is picked and put to the blocked state and when the 
process finished that thread is in dead state.
states:
1 new
2 runnable
3 running
4 blocked
5 dead

1.ActiveState
2.RunnableState
3.RunningState
4.Blocked State
5.Dead State

These are the Thread Life Cycle States