java-线程状态-阻塞和等待-bloked-和-waiting-区别

定义解释
阻塞:当一个线程试图获取一个内部的对象锁(非java.util.concurrent库中的锁),而该锁被其他线程持有,则该线程进入阻塞状态。
等待:当一个线程等待另一个线程通知调度器一个条件时,该线程进入等待状态。例如调用:Object.wait()、Thread.join()以及等待Lock或Condition。
可以通过代码与JConsole来验证
验证阻塞
public static void main(String[] args) throws Exception {
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
// 等待主线程获取锁
Thread.sleep(10000);
// 请求locker对象的内部锁
synchronized (locker) {
System.out.println(“Get locker”);
}
} catch (InterruptedException e) {
// TODO: handle exception
}
}
}, “Blocked Thread”);
thread.start();
// 请求locker内部对象锁
synchronized (locker) {
// 始终持有locker对象的内部锁
while (true) {
;;
}
}
}

NEW

A thread that has not yet started is in this state.

一个被创建的线程,但是还没有调用start方法

RUNNABLE

A thread executing in the Java virtual machine is in this state.

一个正在被执行的线程的状态

BLOCKED

A thread that is blocked waiting for a monitor lock is in this state.

一个线程因为等待临界区的锁被阻塞产生的状态
Lock 或者synchronize 关键字产生的状态

WAITING

A thread that is waiting indefinitely for another thread to perform a
particular action is in this state.

一个线程进入了锁,但是需要等待其他线程执行某些操作。时间不确定
当wait,join,park方法调用时,进入waiting状态。前提是这个线程已经拥有锁了。

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.

一个线程进入了锁,但是需要等待其他线程执行某些操作。时间确定
通过sleep或wait timeout方法进入的限期等待的状态)

TERMINATED

A thread that has exited is in this state.

退出

原文地址:https://my.oschina.net/payzheng/blog/692635

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转载自blog.csdn.net/huanchankuang3257/article/details/82918755