Functional Programming in Java

Chapter 1Hello, Lambda Expressions!

There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult.^[1]

Sir Charles Antony Richard Hoare

Our Java coding style is ready for a remarkable makeover.

The everyday tasks we perform just got simpler, easier, and more expressive. The new way of programming in Java has been around for decades in other languages. With these facilities in Java we can write concise, elegant, and expressive code with fewer errors. We can use this to easily enforce policies and implement common design patterns with fewer lines of code. ...