Semaphore with Read/Write Lock

Question

If a thread has lock on any object, can read methods still work ?

If I have object with various 'get' methods than can I use the object to do print outs while some other thread has lock on it ? I am working on project where object has various properties, which I need to print it out periodically. However, there are other threads running which may gain lock to write those properties. I am using Semaphore for synchronization. Also, I will be doing more reading than writing. What is the best approach to tackle these situation ?

Answer 1

我相信ReentrantReadWriteLock （Java 5+）正是根据您的要求而设计的。