Synchronized methods and blocks allow a thread to lock an object on entry and unlock the object on exit (to the method or block).
同步的方法和代码块允许线程在入口处锁定对象并在出口处解锁(针对方法或代码块)。
Thread 1 exits the synchronized block and returns instance from the getInstance() method.
线程1退出synchronized块并从getInstance()方法返回实例。
In WebSphere Process Server V7, the method to claim a task USES a query table and combines the query and claim methods previously used to eliminate the need for the synchronized block.
在WebSphereProcessServerv 7中，声明任务的方法是用一个查询表，并结合早期用于消除同步块需求的查询和声明方法。
As more advanced JVMs have emerged, the cost of synchronization has decreased, but there is still a performance penalty for entering and leaving a synchronized method or block.
随着更高级的JVM的出现，同步的代价降低了，但出入synchronized方法或块仍然有性能损失。
A lock is acquired on entry to a synchronized method or block, and released on exit, even if the exit occurs due to an exception.
当进入一个同步方法或同步块的时候必须获得该锁，而退出的时候(即使是异常退出)必须释放这个锁。
A lock is acquired on entry to a synchronized method or block, and released on exit, even if the exit occurs due to an exception.
当进入一个同步方法或同步块的时候必须获得该锁，而退出的时候(即使是异常退出)必须释放这个锁。
应用推荐