Java线程的状态

public enum State {
        /**
         * Thread state for a thread which has not yet started.
         * 一个尚未启动的线程的状态。也称之为初始状态、开始状态。
         */
        NEW,

        /**
         * 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.
         * 一个可以运行的线程的状态，可以运行是指这个线程已经在JVM中运行了，
         * 但是有可能正在等待其他的系统资源。也称之为就绪状态、可运行状态
         */
        RUNNABLE,

        /**
         * 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
         * {@link Object#wait() Object.wait}.
         * 一个线程因为等待监视锁而被阻塞的状态。也称之为阻塞状态。
         */
        BLOCKED,

        /**
         * Thread state for a waiting thread.
         * A thread is in the waiting state due to calling one of the
         * following methods:
         * 

         *   
{@link Object#wait() Object.wait} with no timeout
         *   
{@link #join() Thread.join} with no timeout
         *   
{@link LockSupport#park() 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.
         * 一个正在等待的线程的状态。也称之为等待状态。造成线程等待的原因有三种，
         * 分别是调用Object.wait()、join()以及LockSupport.park()方法。处于等待状态的线程，
         * 正在等待其他线程去执行一个特定的操作。例如：因为wait()而等待的线程正在
         * 等待另一个线程去调用notify()或notifyAll()；
         * 一个因为join()而等待的线程正在等待另一个线程结束
         */
        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:
         * 

         *   
{@link #sleep Thread.sleep}
         *   
{@link Object#wait(long) Object.wait} with timeout
         *   
{@link #join(long) Thread.join} with timeout
         *   
{@link LockSupport#parkNanos LockSupport.parkNanos}
         *   
{@link LockSupport#parkUntil LockSupport.parkUntil}
         * 
         *   一个在限定时间内等待的线程的状态。也称之为限时等待状态。
         *   造成线程限时等待状态的原因有五种，
         *   分别是：Thread.sleep(long)、Object.wait(long)、join(long)、
         *       LockSupport.parkNanos(obj,long)和LockSupport.parkUntil(obj,long)。
         */
        TIMED_WAITING,

        /**
         * Thread state for a terminated thread.
         * The thread has completed execution.
         * 一个完全运行完成的线程的状态。也称之为终止状态、结束状态   
         */
        TERMINATED;
    }