August 2020
Intermediate to advanced
1296 pages
30h 50m
English
book
OCP Oracle Certified Professional Java SE 11 Developer Complete Study Guide
by Jeanne Boyarsky, Scott Selikoff
Content preview from OCP Oracle Certified Professional Java SE 11 Developer Complete Study Guide
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Chapter 6Lambdas and Functional Interfaces
OCP EXAM OBJECTIVES COVERED IN THIS CHAPTER:
- Programming Abstractly Through Interfaces
- Declare and use List and ArrayList instances
- Understanding Lambda Expressions
When we covered the Java APIs in the previous chapter, we didn’t cover the ones that use lambda syntax. This chapter remedies that! You’ll learn what a lambda is used for, about common functional interfaces, how to write a lambda with variables, and the APIs on the exam that rely on lambdas.
Writing Simple Lambdas
Java is an object-oriented language at heart. You’ve seen plenty of objects by now. In Java 8, the language added the ability to write code using another style.
Functional programming is a way of writing code more declaratively. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.