Thread0调用了wait()方法后,会释放掉对象锁并暂停执行后续代码,即从wait()方法之后到run()方法结束的代码,都将立即暂停执行,这就是wait()方法在线程中的作用。 CPU会将对象锁分配给一直等候的Thread1线程,Thread1执行了notify()方法后,会通知其他正在等待线程(Thread0)得到锁,但会继续执行完自己锁内的
1.wait和notify,notifyAll: wait和notify,notifyAll是Object类方法,因为等待和唤醒必须是同一个锁,不可以对不同锁中的线程进行唤醒,而锁可以是任意对象,所以可以被任意对象调用的方法,定义在Object基类中。 wait()方法:对此对象调用wait方法导致本线程放弃对象锁,让线程处于冻结状态,进入等待线程的线程池当中。wait是...
publicclassWaiterimplementsRunnable{privateMessage msg;publicWaiter(Message m){this.msg=m;}@Overridepublicvoidrun(){String name=Thread.currentThread().getName();synchronized(msg){try{System.out.println(name+" waiting to get notified at time:"+System.currentTimeMillis());msg.wait();}catch(Interrup...
notify();//Later, when the necessary event happens, the thread that is running it calls notify() from a block synchronized on the same object.// Called by Consumer publicsynchronizedString getMessage() throws InterruptedException { while(messages.size() == 0) { wait();//By executing wait(...
static class NotifyThread implements Runnable{ @Override public void run() { // 获取等wait线程同...
2. notify()和wait()-示例1 public class ThreadA { public static void main(String[] args){ ThreadB b = new ThreadB(); b.start(); synchronized(b){ try{ System.out.println("Waiting for b to complete..."); b.wait(); }catch(InterruptedException e){ e.printStackTrace(); } System....
一.wait()、notify()和notifyAll() wait()、notify()和notifyAll()是Object类中的方法: * Wakes up a single thread that is waiting on this object's * monitor. If any threads are waiting on this object, one of them * is chosen to be awakened. The choice is arbitrary and occurs at ...
// wait()会让已经获得synchronized 函数或者代码块控制权的Thread暂时休息,并且丧失控制权 // 这个时候,由于该线程丧失控制权并且进入等待,其他线程就能取得控制权,并且在适当情况下调用notifyAll()来唤醒wait()的线程。 // 需要注意的是,被唤醒的线程由于已经丧失了控制权,所以需要等待唤醒它的线程结束操作,从而才...
* thread waits on an object's monitor by calling one of the * wait methods. */ publicfinalnativevoidnotifyAll(); /** * Causes the current thread to wait until either another thread invokes the * {@link java.lang.Object#notify()} method or the ...
每个Monitor在某个时刻,只能被一个线程拥有,该线程就是 “Active Thread”,而其它线程都是 “Waiting Thread”,分别在两个队列 “Entry Set”和“Wait Set”里面等候。在“Entry Set”中等待的线程状态是 “Waiting for monitor entry”,而在 “Wait Set”中等待的线程状态是 “in Object.wait()”。如果你不...