Get up to 60 % extra points for free! More info

Lesson 11 - StreamAPI in Java - Generating streams

In the previous lesson, Introduction to StreamAPI and lambda expressions in Java, we introduced StreamAPI. Today, in this Java tutorial, we're going to introduce ways to create streams.

Creating streams

All of the collections we've introduced offer the stream() method, which can create a stream for us:

List<String> list = Arrays.asList("Peter", "John", "Michael");
Stream<String> stream = list.stream();

We can also create a stream from an array which isn't a fully-featured collection by using the stream() method from the Arrays library class:

String[] array = new String[] {"Peter", "John", "Michael"};
Stream<String> stream = Arrays.stream(array);

The Stream interface also has the of() method which we can use to create a new stream:

Stream<String> stream = Stream.of("Peter", "John", "Martin");

Next, we're going to list numeric stream generators. These are utility methods we use to create numeric streams:


 

...End of the preview...
Continue further

You will gain knowledge worth hundreds of thousands for a few crowns

You've come here and that's great! We believe that the first lessons showed you something new and useful
Do you want to continue the course? Go to the premium section.

Limited offer: Learn all knowledge and save money

Buy lessons and exercise submitting one by one 80 points
Buy all currently available lessons with exercise submitting and other features for an exclusive price 68 points ($6.12)
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 13 lessons in this course including exercise submitting while saving $1.08. This offer is limited for the first lessons only with an additional exclusive 15% discount.
You gain 68 points for adding an article to the site, or for $7.20 $6.12

Warning, by buying just this lesson you'll lose the limited 15% discount for the package of all the lessons.

Buy only the lesson 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

This article is licensed: Premium, by buying this article, you agree with the terms of use.

What will you get from us in the next lessons?
  • Unlimited and permanent access to individual lessons.
  • High quality IT knowledge.
  • Skills to help you get your dream and well-paid job.

Article description

Requested article covers this content:

In this Java tutorial, we'll learn about creating streams. We'll introduce numeric stream generators and their usage.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

Article has been written for you by Petr Štechmüller
Avatar
Activities (4)