The synchronized keyword: By adding the synchronized keyword before a method or using a synchronized block to implement locking, it ensures that only one thread can access that method or block of code at a time.
ReentrantLock class: Achieve locking and unlocking by creating a ReentrantLock object and calling its lock() and unlock() methods.
The ReadWriteLock interface enables read-write separation of locks, allowing multiple threads to read from a shared resource simultaneously, while only one thread can write to the shared resource.
Semaphore class: The Semaphore class allows controlling the number of threads accessing shared resources at the same time.
CountDownLatch class: It allows threads to wait for a certain condition to be met before continuing execution.
CyclicBarrier class: with the CyclicBarrier class, multiple threads can meet at a certain point and then continue executing simultaneously.
LockSupport class: The LockSupport class can be used to block and unblock threads.
