How does reentrantlock lock a specific object?

Question

If I have an array object with a length of 10: {code...} Access to each object is mutually exclusive, but access between multiple objects can be concurrent. Then using synchonized can be like this: {code...} I would like to ask, how to implement such a lock if using reentrantlock? Remark:...

代言 · Answer

Initialization lock:

Lock[] lockList = new ReentrantLock[10];
for (int i = 0; i < 10; i ++) {
    lockList[i] = new ReentrantLock();
}

When locking is required:

lockList[i].lock();
try {
    ...
} finally {
    lockList[i].unlock();
}

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