How do the synchronization methods in Java and Kotlin Coroutines differ?

In Java, synchronization is usually implemented using the synchronized keyword, which locks the object's monitor, ensuring mutual exclusion when accessing critical sections of code.

In Kotlin Coroutines, synchronization is achieved through other means, as coroutines are lightweight threads operating within asynchronous programming:

• Mutex — provides a mutual exclusion mechanism for coroutines, allowing safe access to shared resources.
• Channels — enable communication and synchronization between coroutines.
• Atomic operations — for working with primitive types without locks.

Differences:

• In Java, synchronized blocks lock the thread, which can lead to blocking and reduced performance.
• In Kotlin Coroutines, synchronization does not block the thread but suspends the coroutine, allowing other coroutines to run, which improves scalability.

Example of using Mutex in Kotlin Coroutines:

val mutex = Mutex()
var counter = 0

suspend fun safeIncrement() {
    mutex.withLock {
        counter++
    }
}