OCP Oracle Certified Professional Java SE 17 Developer Study Guide

Chapter 8Lambdas and Functional Interfaces

OCP EXAM OBJECTIVES COVERED IN THIS CHAPTER:

• Utilizing Java Object-Oriented Approach
  • Understand variable scopes, use local variable type inference, apply encapsulation, and make objects immutable
  • Create and use interfaces, identify functional interfaces, and utilize private, static, and default interface methods

In this chapter, we start by introducing lambdas, a new piece of syntax. Lambdas allow you to specify code that will be run later in the program.

Next, we introduce the concept of functional interfaces, showing how to write your own and identify whether an interface is a functional interface. After that, we introduce another new piece of syntax: method references. These are like ...