Core Java for the Impatient, 3rd Edition

Chapter 3

Interfaces and Lambda Expressions

Topics in This Chapter

• 3.1 Interfaces

• 3.2 Static, Default, and Private Methods

• 3.3 Examples of Interfaces

• 3.4 Lambda Expressions

• 3.5 Method and Constructor References

• 3.6 Processing Lambda Expressions

• 3.7 Lambda Expressions and Variable Scope

• 3.8 Higher-Order Functions

• 3.9 Local and Anonymous Classes

• Exercises

Java was designed as an object-oriented programming language in the 1990s when object-oriented programming was the principal paradigm for software development. Interfaces are a key feature of object-oriented programming: They let you specify what should be done, without having to provide an implementation.

Long before there was object-oriented programming, there were functional programming ...