1.NEW：Thread state for a thread which has not yet started.
2.RUNNABLE ：Thread state for a runnable thread. A thread in the runnable state is executing in the Java virtual machine but it may be waiting for other resources from the operating system such as processor.
3.BLOCKED ：Thread state for a thread blocked waiting for a monitor lock.A thread in the blocked state is waiting for a monitor lock to enter a synchronized block/method or reenter a synchronized block/method after calling {Object.wait}.
4.WAITING： Thread state for a waiting thread. A thread is in the waiting state due to calling one of the
following methods:
* { Object.wait} with no timeout
* {Thread.join} with no timeout
* {LockSupport.park}
A thread in the waiting state is waiting for another thread to perform a particular action. For example, a thread that has called Object.wait() on an object is waiting for another thread to call Object.notify() or Object.notifyAll() on that object. A thread that has called Thread.join() is waiting for a specified thread to terminate.
5.TIMED_WAITING ：Thread state for a waiting thread with a specified waiting time. A thread is in the timed waiting state due to calling one of the following methods with a specified positive waiting time:
* {Thread.sleep}
* {Object.wait} with timeout
* { Thread.join} with timeout
* { LockSupport.parkNanos}
* {LockSupport.parkUntil}
6.TERMINATED ：Thread state for a terminated thread. The thread has completed execution.
