文章目录

状态图六种状态之一六种状态之二如何记忆

状态图

六种状态之一

先来一波官方的解释 A thread state. A thread can be in one of the following states:

NEW

A thread that has not yet started is in this state. 创建了但是没有start

RUNNABLE

A thread executing in the Java virtual machine is in this state. 可运行的(不是正在运行)

BLOCKED

A thread that is blocked waiting for a monitor lock is in this state. 被阻塞等到锁(被synchronized 修饰)

WAITING

A thread that is waiting indefinitely for another thread to perform a particular action is in this state. 等待另外一个线程的消息.

TIMED_WAITING

A thread that is waiting for another thread to perform an action for up to a specified waiting time is in this state. 时间等待

TERMINATED

A thread that has exited is in this state. 退出

六种状态之二

先看图的左侧.是线程状态的主轴线.

Created with Raphaël 2.2.0 NEW RUNNABLE TERMINATED

再来看右侧

Created with Raphaël 2.2.0 BLOCKED WAITING TIME_WAITING BLOCKD 和RUNNABLE之间的转换 获取了monitor锁 进入到被synchronized修饰的方法或者代码块 BLOCKED RUNNABLE WAITING 和RUNNABLE之间的转换 Object.wait Thread.join LockSuper.park Object.notify Object.notifyAll LockSuper.unpark RUNNABLE WAITING

-TIME_WAITING 和RUNNABLE之间的转换

Thread.sleep Object.wait Thread.join Waiting time coming Object.notify Object.notifyAll RUNNABLE TIME_WAITING

如何记忆

左边三个是new runnable terminated;右边三个是block time_waiting waiting;右边三个和runnable之间的关系密切;block是因为synchronized关键字