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.

再来看右侧

• BLOCKD 和RUNNABLE之间的转换

• WAITING 和RUNNABLE之间的转换

-TIME_WAITING 和RUNNABLE之间的转换

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