In this blog post we will discuss about one of the very important java interview question What is difference between intrinsic synchronization and explicit locking using Lock?
| Intrinsic synchronization | Explicit Locking using Lock and Condition |
| It is not possible to interrupt a thread waiting to acquire a lock, or attempt to acquire a lock without being willing to wait for it forever. | It gives option for timed, polled or Interruptible locks helping to avoid probabilistic deadlock. |
| Responsibility of releasing a lock is handled by JVM even in case of exception occurs | Lock has to be released manually in a finally block once we have modified the protected state. |
| When multiple locks are acquired, they must be released in the same order, and all locks must be released in the same lexical scope in which they were acquired. | Ability to implement non-block-structured locking. Lock doesn’t have to be released in the same block of code, unlike synchronized locks. |
| Choice of fairness to the lock acquisition is not supported by Intrinsic synchronization | Offers choice of fairness to the lock acquisition when multiple threads try to acquire the shared lock setting fairness flag to true |
| Available from initial version of java | Available from JDK 1.5 onwards |
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That’s all about What is the difference between intrinsic synchronization and explicit locking using Lock?
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