java 获取线程状态（JAVA线程的状态）

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本文目录一览：

• 1、java获取当前线程状态。
• 2、java多线程有哪些状态？
• 3、java怎么从一个类中获取另一个类中的线程的状态。

java获取当前线程状态。

java线程的状态有下面几种状态java 获取线程状态：
/**
* Thread state for a thread which has not yet started.
*/
NEW,

/**
* Thread state for a runnable thread. A thread in the runnable
* state is executing in the Java virtual machine but it may
* be waiting for other resources from the operating system
* such as processor.
*/
RUNNABLE,

/**
* 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:
* <ul
* <li{@link Object#wait() Object.wait} with no timeout</li
* <li{@link #join() Thread.join} with no timeout</li
* <li{@link LockSupport#park() LockSupport.park}</li
* </ul
*
* <pA thread in the waiting state is waiting for another thread to
* perform a particular action.
*
* For example, a thread that has called <ttObject.wait()</tt
* on an object is waiting for another thread to call
* <ttObject.notify()</tt or <ttObject.notifyAll()</tt on
* that object. A thread that has called <ttThread.join()</tt
* is waiting for a specified thread to terminate.
*/
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:
* <ul
* <li{@link #sleep Thread.sleep}</li
* <li{@link Object#wait(long) Object.wait} with timeout</li
* <li{@link #join(long) Thread.join} with timeout</li
* <li{@link LockSupport#parkNanos LockSupport.parkNanos}</li
* <li{@link LockSupport#parkUntil LockSupport.parkUntil}</li
* </ul
*/
TIMED_WAITING,
/**
* Thread state for a terminated thread.
* The thread has completed execution.
*/
TERMINATED;

java多线程有哪些状态？

初始态：一个线程调用了new方法之后，并在调用start方法之前的所处状态。

就绪：一旦线程调用了start 方法，线程就转到Runnable 状态。

阻塞/ NonRunnable：线程处于阻塞/NonRunnable状态，这是由两种可能性造成的：要么是因挂起而暂停的，要么是由于某些原因而阻塞的，例如包括等待IO请求的完成。

停止/退出：线程转到退出状态，这有两种可能性，要么是run方法执行结束，要么是调用了stop方法。

java怎么从一个类中获取另一个类中的线程的状态。

package a;
class A implements Runnable{
Thread t;
A(){
t=new Thread(this);
t.start();
}
@Override
public void run() {
for (int i=1;i<=3;i++){
try {
Thread.sleep(1000);
System.out.println(3-i);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("线程A停止了");
}
}
class B{
public void show(){
A a =new A();
for (int i=1;i<=10;i++){
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(a.t.isAlive());
}
}
}
public class aaaaaaa{

public static void main(String args[]){

B b=new B();
b.show();
}
}

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