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This article mainly explains "how to use LockSupport under java concurrent package". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn "how to use LockSupport under the java concurrent package".

Java.util.concurrent.locks.LockSupport

Concept: use LockSupport to block and wake up threads. The method to block the thread: public static void park (): blocks the current thread and returns only if the unpark () method is called or the current thread is interrupted. Public static void parkNanos (long nanos) public static void parkUntil (long deadline) wakes up threads: public static void unpark (Thread thread): wakes up blocked threads. In Java6, LockSupport adds three methods: public static void park (Object blocker) public static void parkNanos (Object blocker, long nanos) public static void parkUntil (Object blocker, long deadline) parameter: blocker: used to identify the object that the current thread is waiting for (that is, blocking object), mainly used for troubleshooting and system monitoring. When a thread dump, the park () method with blocker parameter has the following more content than the park () method without blocker parameter (that is, indicates the type of blocking object):-parking to wait for (com.jxn.test.TestLockSupport) indicates: 1) when a thread (due to the use of the synchronized keyword) blocks on an object Through the thread dump, you can see the blocking object of the thread, so you can easily locate the problem. 2) when using the park () method without blocker parameter in LockSupport to block the object, the blocking object of the thread cannot be seen through the thread dump; therefore, the park () method with blocker parameter is provided in java6 to solve this problem. At this point, I believe you have a deeper understanding of "how to use LockSupport under the java concurrent package". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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