[concurrency-interest] The semantics of reentrant lock

[Nader Aeinehchi]

Hi

Forgive me for my ignorance, but I cannot be 100% sure from reading 
JavaDoc documentation whether java.util.concurrency.ReentrantLock has 
the same semantics as the intrinsic lock.  Is it so that lock.unlock() 
does not have any effect once method2 is called from method1?

class Foo{

private final Lock lock = new ReentrantLock();

public void method1(){
     lock.lock();
     try{
         //calls method2
         method2();
     }finally{
         lock.unlock();
     }
}

public void method2(){
     lock.lock();
     try{
         //do something
     }finally{
         lock.unlock();
     }
}

}

Thanks.