Java中线程的生命周期是什么？
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What is the LifeCycle of Thread in Java?
提问by Ullas
In java when we create an object of thread
在java中，当我们创建一个线程对象时
Thread t1 = new Thread(Runnable object);
t1.start();
What are the different stages of lifecycle of thread t1and after execution of run()will be the state of t1?
线程生命周期的不同阶段t1和执行run()后将是t1什么状态？
回答by user6160675
Thread States:
线程状态：
- New - Created but not executed
- Runnable - Running
- Terminated - End of the Run Method Scope was reached.
- 新建 - 创建但未执行
- 可运行 - 运行
- 已终止 - 已达到运行方法范围的结尾。
A Thread can also have Waiting, Timed Waiting and Blocked as Status
一个线程也可以有 Waiting、Timed Waiting 和 Blocked 作为状态
For Further Informations see here: https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.State.html
有关更多信息，请参见此处：https: //docs.oracle.com/javase/7/docs/api/java/lang/Thread.State.html
回答by Venkat
A thread goes through various stages in its life cycle. For example, a thread is born, started, runs, and then dies. Following diagram shows the complete life cycle of a thread.
一个线程在其生命周期中经历了不同的阶段。例如，一个线程诞生、启动、运行，然后死亡。下图展示了一个线程的完整生命周期。
Java Thread Above-mentioned stages are explained here:
Java Thread 上面提到的阶段在这里解释：
New:A new thread begins its life cycle in the new state. It remains in this state until the program starts the thread. It is also referred to as a born thread.
New:新线程在新状态下开始其生命周期。它一直保持这种状态，直到程序启动线程。它也被称为天生线程。
Runnable: After a newly born thread is started, the thread becomes runnable. A thread in this state is considered to be executing its task.
Runnable: 新线程启动后，线程变为可运行状态。处于此状态的线程被认为正在执行其任务。
Waiting:Sometimes, a thread transitions to the waiting state while the thread waits for another thread to perform a task.A thread transitions back to the runnable state only when another thread signals the waiting thread to continue executing.
Waiting:有时，一个线程转换到等待状态，而该线程等待另一个线程执行任务。只有当另一个线程通知等待线程继续执行时，线程才会转换回可运行状态。
Timed waiting:A runnable thread can enter the timed waiting state for a specified interval of time. A thread in this state transitions back to the runnable state when that time interval expires or when the event it is waiting for occurs.
Timed waiting:一个可运行的线程可以在指定的时间间隔内进入定时等待状态。当该时间间隔到期或它正在等待的事件发生时，处于此状态的线程将转换回可运行状态。
Terminated ( Dead ): A runnable thread enters the terminated state when it completes its task or otherwise terminates.
Terminated ( Dead )：可运行线程在完成其任务或以其他方式终止时进入终止状态。
Source:http://www.tutorialspoint.com/java/java_multithreading.htm
来源：http: //www.tutorialspoint.com/java/java_multithreading.htm
回答by Ravindra babu
A thread can be in one of the following State:
线程可以处于以下状态之一：
NEW :A thread that has not yet started is in this state.
NEW :尚未启动的线程处于此状态。
RUNNABLE :A thread executing in the Java virtual machine is in this state.
RUNNABLE :在 Java 虚拟机中执行的线程处于这种状态。
BLOCKED:A thread in the blocked state is waiting for a monitor lock to enter a synchronized block/method or reenter a synchronizedblock/method after calling Object.wait.
BLOCKED:处于阻塞状态的线程正在等待监视器锁进入同步块/方法或synchronized调用后重新进入块/方法Object.wait。
WAITING:A thread that is waiting indefinitely for another thread to perform a particular action is in this state.
WAITING:无限期等待另一个线程执行特定操作的线程处于此状态。
A thread is in the waiting state due to calling one of the following methods:
由于调用以下方法之一，线程处于等待状态：
Object.wait with no timeout
Thread.join with no timeout
LockSupport.park
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.
TIMED_WAITING:等待另一个线程执行操作达指定等待时间的线程处于此状态。
A thread is in the timed waiting state due to calling one of the following methods with a specified positive waiting time:
由于使用指定的正等待时间调用以下方法之一，线程处于定时等待状态：
Thread.sleep
Object.wait with timeout
Thread.join with timeout
LockSupport.parkNanos
LockSupport.parkUntil
TERMINATED:A thread that has exited is in this state.
TERMINATED:已退出的线程处于此状态。
Refer to this articleby pramodbablad to understand various states in this diagram
请参阅pramodbablad 的这篇文章以了解此图中的各种状态
In above diagram, except RUNNING( which has been shown in a circle), all other rectangular blocks denotes various thread states.
在上图中，除了RUNNING（已用圆圈表示）之外，所有其他矩形块都表示各种thread states。
