What are the differences between Java Async and Reactive programming?

What are the differences between Java Async and Reactive programming?

Java Async programming allows for non-blocking operations using futures and callbacks, while Reactive programming is based on the Observer pattern, enabling asynchronous data streams.

Can you give me an example of when to use each?

Use Java Async for simple tasks like file I/O where you want to avoid blocking. Use Reactive for complex data flows, like handling multiple user inputs in real-time.

What libraries are commonly used for Reactive programming in Java?

Common libraries include Project Reactor, RxJava, and Akka Streams, which provide powerful tools for building reactive applications.

Are there performance differences between the two approaches?

Yes, Reactive programming can handle more concurrent operations efficiently, but it may have a steeper learning curve compared to Java Async.