How to implement transaction control with Java multithreading?

In Java, multithreaded transaction control can be implemented in several ways.

1. By using the synchronized keyword, multiple threads can be controlled in accessing shared resources. Adding the synchronized keyword before a method or code block ensures that only one thread can access the resource at a time, preventing inconsistent data due to concurrent access.
2. By using the Lock interface, Java offers the Lock interface and the ReentrantLock class to implement a more flexible locking mechanism. The Lock interface enables finer-grained control over locking, such as locking and unlocking the same resource in different code blocks.
3. Utilizing a transaction manager: For operations that require transaction control, Java’s transaction manager can be used to oversee multiple threads accessing a database or other resources. The transaction manager ensures that a group of operations will either all be successfully committed or all rolled back, thus ensuring data consistency.
4. By using the ThreadLocal class, you can achieve thread-level data isolation, where each thread can maintain its own local variable copy to prevent interference between multiple threads. When dealing with multi-threaded transaction control, ThreadLocal can be used to store transaction-related data to ensure that operations between threads do not affect each other.

By using the above method, it is possible to implement multi-threaded transaction control, ensuring that multiple threads accessing shared resources do not lead to data anomalies or inconsistencies.