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This article Xiaobian introduces in detail for you "Java reentrant lock and non-reentrant lock how to write", the content is detailed, the steps are clear, the details are handled properly, I hope this "Java reentrant lock and non-reentrant lock how to write" article can help you solve your doubts, the following follow the editor's ideas slowly in depth, together to learn new knowledge.

Non-reentrant lock

/ / non-reentrant lock public class LockTest {Lock lock=new Lock (); public void a () throws InterruptedException {lock.lock (); b (); lock.unlock ();} / / non-reentrant public void b () throws InterruptedException {lock.lock (); / /. Lock.unlock ();} public static void main (String [] args) throws InterruptedException {LockTest lockTest=new LockTest (); lockTest.a (); lockTest.b ();}} class Lock {/ / whether or not to occupy private boolean flag=false;// use lock public synchronized void lock () throws InterruptedException {while (flag) {wait ();} flag=true;} public synchronized void unlock () {flag=false; notify ();}}

Reentrant lock

/ / reentrant lock public class LockTest {ReLock lock=new ReLock (); public void a () throws InterruptedException {lock.lock (); System.out.println (lock.getCount ()); b (); lock.unlock (); System.out.println (lock.getCount ());} / non-reentrant public void b () throws InterruptedException {lock.lock (); System.out.println (lock.getCount ()); / /. Lock.unlock (); System.out.println (lock.getCount ());} public static void main (String [] args) throws InterruptedException {LockTest lockTest=new LockTest (); lockTest.a (); Thread.sleep (1000); System.out.println (lockTest.lock.getCount ());}} / / whether the reentrant lock class ReLock {/ / occupies private boolean flag=false;private Thread LockedBY=null;// storage thread private int count=0 / / use the lock public synchronized void lock () throws InterruptedException {Thread t=Thread.currentThread (); while (disabled lockedBYBYroomt) {wait ();} flag=true;LockedBY=t;count++;} public synchronized void unlock () {if (Thread.currentThread () = = LockedBY) {count--;if (count==0) {flag=false; notify (); LockedBY=null;}} public int getCount () {return count }} read here, this article "how to write Java reentrant locks and non-reentrant locks" has been introduced. If you want to master the knowledge points of this article, you still need to practice and use it yourself. If you want to know more about related articles, welcome to follow the industry information channel.

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