blocked java线程_Java线程状态：BLOCKED与WAITING的区别

Doc说明：

/**

* 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}.

*/

BLOCKED,

/**

* Thread state for a waiting thread.

* A thread is in the waiting state due to calling one of the

* following methods:

*

*

*

*

*

*

*

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.

*/

WAITING,

BLOCKED是指线程正在等待获取锁；WAITING是指线程正在等待其他线程发来的通知(notify)，收到通知后，可能会顺序向后执行(RUNNABLE)，也可能会再次获取锁，进而被阻塞住(BLOCKED)。