Reactive Programming in Java with Example

This article explains the concept of reactive programming and shows how to implement it in Java using Reactor Framework with example.

Reactive programming is a programming paradigm that is concerned with writing asynchronous, non-blocking code. In Java, you can use the Reactor framework to implement reactive programming.

Here’s a simple example of reactive program in Java using the Reactor framework:

import reactor.core.publisher.Flux;

public class ReactiveProgrammingExample {

  public static void main(String[] args) {
    Flux<String> names = Flux.just("John", "Jane", "Jim");
    
    names.subscribe(name -> System.out.println(name));
  }
}

import reactor.core.publisher.Flux;

public class ReactiveProgrammingExample {

public static void main(String[] args) {

Flux<String> names = Flux.just("John", "Jane", "Jim");

names.subscribe(name -> System.out.println(name));

}

The output of the above code would be:

John
Jane
Jim

In this example, we create a 'Flux' of 'String' values, which represents an asynchronous stream of data. The 'Flux' is created using the 'just' method, which takes an array of elements and creates a 'Flux' that emits these elements in the specified order.

We then subscribe to the 'Flux' using the 'subscribe' method, passing in a lambda expression that prints each value of the 'Flux' to the console. When the 'subscribe' method is called, the 'Flux' starts emitting its values, and the lambda expression is executed for each value.

This is just a simple example of reactive programming in Java. It demonstrates the basic concepts of the Reactor framework and how you can use it to write asynchronous, non-blocking code in Java.

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