# Java线程状态


关于java的线程状态，实际上你只要看`Thread.java`源码就可以了，网上很多资料都不全，而且往往你看了资料以后根本记不住，反而自己去花时间看看源码，思考每次位运算的结果，才能让你真的理解和掌握线程的状态转换~当然，我也不建议你看我的这篇文章，毕竟我是写给我自己看的。

### NEW

> Thread state for a thread which has not yet started.

还没有开始的状态，就是new

### RUNNABLE

> Thread state for a runnable thread.  A thread in the runnable state is executing in the Java virtual  achine but it may be waiting for other resources from the operating system such as processor.

正在jvm虚拟机中运行的状态，但是可能还需要等待系统资源，类似于cpu这种资源。

### 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

在monitor管程阻塞等待获取资源（锁）的状态，主要表现在synchronized block/method

### 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.

当调用`Object.wait()`、`Thread.join()`、`LockSupport.park()`方法的时候，调用线程就会进入waiting状态，只有当线程调用`Object.notify()`或者`Object.notifyAll()`方法的时候才会终止。另外，一个线程调用另外一个线程的`join()`方法，则该线程将等待另外一个线程执行结束。

### 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.

### TERMINATED


> Thread state for a terminated thread.The thread has completed execution.