synchronization and exception

[Ranadhir Nag]

From what i understand about synchronization,the following 2 ways of synchronizing an instance variable are equivalent:

Route 1:

void reverseOrder() {
synchronized (this) {
int halfWay = intArray.length / 2;
for (int i = 0; i < halfWay; ++i) {
.......
......
}
}
}

Route 2:

synchronized void reverseOrder() {

int halfWay = intArray.length / 2;
for (int i = 0; i < halfWay; ++i) {
i....
.......
}
}
}

If so,we can use these 2 techniques inter-changeably to protect the instance variable 'intArray'
Does anyone differ on this?

Now in either of these techniques,if we throw an exception mid-way,does the lock get released automatically?

[Adam Michalik]

Please, use code tags.

Yes, marking the method as synchronized and synchronizing the whole method body on this object has exactly the same result. And always when you return from a synchronized method or a synchronized block, the lock is released, no matter if it's a normal return or an exception.