The Flux.from methods

The From methods can be used to generate a Flux from various sources, such as arrays, collections, and so on. In this case, all of the values are identified as multi-valued datasets beforehand. The generated Flux publishes the value events for each value in the original dataset, followed by a completion event. The offered methods have the following variants:

• Flux.fromArray: This is used to build a stream from an array of a type.
• Flux.fromIterable: This is used to build a stream from collections. All collections are of the Iterable<T> type, which can be passed to this to generate the intended stream.

• Flux.fromStream: This is used to build a Flux from an existing Java 8 stream or a Java 8 stream supplier. Consider the following code:

Flux.fromArray(new Integer[]{1,1,2,3,5,8,13});
Flux.fromIterable(Arrays.asList("Red", "Blue", "Yellow", "Black"));
Flux.fromStream(IntStream.range(1,100).boxed());