Streams

• Declarative/Functional wrapper to operative on data sources, to make bulk operations fast and quick.
• An interface not concrete implementation

Different ways to create a stream

• using stream() from collection

// Stream from collection
List<String> fruitsCollection = Arrays.asList("apple", \
                                        "mango", \
                                        "oranges", \
                                        "grape", \
                                        "guava");
Stream fruitsStream = fruitsCollection.stream();

• using stream.of(...)

// Stream creation from specific value
Stream alphabetStream = Stream.of("a", "b", "c");

• using Arrays.stream()

// Stream from array
String[] fruitsArray = ["apple", "oranges", "mango"];
Stream fruitsStream = Arrays.stream(fruitsArray);

• using stream.generate() for infinite stream

// Infinite Stream
Stream randomNumberStream = Stream.generate( () -> Math.random() );