java - 显示 java 同步块(synchronized block)如何工作的示例代码

Question

我正在学习java多线程，我发现很难理解同步块(synchronized block)是如何工作的:

 synchronized(Object o){
     // do something
    }

请给出一些示例代码，可以显示对象 o 被阻止。据我了解，在执行同步块(synchronized block)时，从另一个线程访问对象 o 将被阻止？

Answer 1

Synchronization in Java is an important concept since Java is a multi-threaded language where multiple threads run in parallel to complete program execution. In multi-threaded environment synchronization of java object or synchronization of java class becomes extremely important. Synchronization in Java is possible by using java keyword "synchronized" and "volatile”. Concurrent access of shared objects in Java introduces to kind of errors: thread interference and memory consistency errors and to avoid these errors you need to properly synchronize your java object to allow mutual exclusive access of critical section to two threads.

阅读更多:http://javarevisited.blogspot.com/2011/04/synchronization-in-java-synchronized.html#ixzz2LOWwnCjH

请看这个Example