Thread state of five

The thread has 5 states:

1. Create: A thread object is instantiated, but it has not been started.

2. Ready: Call the start() method of the thread object to complete the startup, and enter the thread pool to wait for CPU resources to be seized (CPU resources have not been seized at this time).

3. Running: The thread preempts CPU resources and executes tasks within a certain period of time.

4. Blocking: The running thread suspends the execution of tasks and releases the occupied CPU resources (Note: After the unblocking state, the thread does not return to the running state, but returns to the ready state, waiting to obtain CPU resources).

5. Termination: Also known as the death state, the thread is finished running or the thread is terminated due to an exception.

Under certain circumstances, the state of threads can be converted to each other