monitor. If any threads are waiting on this object, one of them is chosen to be awakened. The choice is arbitrary and occurs at the discretion of the implementation. A thread waits on an object's monitor by cal
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 the discretion of the implementation. A thread waits on an object’s monitor by calling one of the...
* address of the object into an integer, but this implementation * technique is not required by the * Java™ programming language.) * * @return a hash code value for this object. * @see java.lang.Object#equals(java.lang.Object) * @see java.lang.System#identityHashCode */publicnati...
one of them is chosen to be awakened. The choice is arbitrary and occurs at the discretion of the implementation. A thread waits on an object's monitor by calling one of the wait methods.
它们分别位于同步代码块的开始和结束位置。当jvm执行到monitorenter指令时,当前线程试图获取monitor对象的所有权,如果未加锁或者已经被当前线程所持有,就把锁的计数器+1;当执行monitorexit指令时,锁计数器-1;当锁计数器为0时,该锁就被释放了。如果获取monitor对象失败,该线程则会进入阻塞状态,直到其他线程释放锁。
源码注释:Wakesupasinglethreadthatiswaitingonthisobject'smonitor.Ifanythreadsarewaitingonthisobject,oneofthemischosentobeawakened.Thechoiceisarbitraryandoccursatthediscretionoftheimplementation.Athreadwaitsonanobject'smonitorbycallingoneofthe{@codewait}methods.源码:publicfinalnativevoidnotify(); ...
* monitor. If any threads are waiting on this object, one of them * is chosen to be awakened. The choice is arbitrary and occurs at * the discretion of the implementation. A thread waits on an object's * monitor by calling one of the {@code wait} methods. * <p> * The awakened ...
importjava.io.*;publicclassclassName{publicvoidwithdraw(doubleamount)throwsRemoteException,InsufficientFundsException{//Method implementation}//Remainder of class definition} finally关键字 finally 关键字用来创建在 try 代码块后面执行的代码块。 无论是否发生异常,finally 代码块中的代码总会被执行。
当一个线程拥有Monitor后,经过某些条件的判断(比如用户取钱发现账户没钱),这个时候需要调用Object的wait方法,线程就释放了Monitor,进入wait-set队列,等待Object的notify方法(比如用户向账户里面存钱)。当该对象调用了notify方法或者notifyAll方法后,wait-set中的线程就会被唤醒,然后在wait-set队列中被唤醒的线程和entry-...
ForwardingFileObject ForwardingJavaFileManager ForwardingJavaFileObject ForwardRequest ForwardRequest ForwardRequestHelper ForwardRequestHelper Frame FREE_MEM Future FutureTask GapContent GarbageCollectorMXBean GatheringByteChannel GaugeMonitor GaugeMonitorMBean GeneralPath GeneralSecurityException...