Get up to 50 % extra points for free! More info
discount week 50

Lesson 13 - StreamAPI in Java - Closing stream methods

In the previous lesson, StreamAPI in Java - Modifying stream methods, we learned stream methods that modify the stream in a specific way. In today's Java tutorial, we're going to look at closing stream methods, which we usually use to finish work with the stream and possibly get a result.

Closing stream methods

As we've mentioned at the beginning, we're going to focus on methods, that no longer return a stream, but a value or a data collection.

The findFirst() Method

The method's signature is as follows:


The method tries to find the first element that matches all previously applied filters and properties. The return value is of the Optional<T> type, because there may be no element matching the applied filters.

In the first example, we're going to search for the first name that's longer than 4 characters:


...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 stream methods we use to close streams and get the results.

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