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Java Magazine
Week of May 31, 2021
Everything you need to know about lambdas.
Lambdas aren’t new. Yet many developers struggle with lambdas and the concept of functional programming. We’ve received some correspondence from Java Magazine readers, and lambdas are frequently mentioned as a “please publish more about this” topic.

In that light, we are republishing Venkat Subramaniam’s outstanding two-part series from 2015. You can read the first part, “Functional programming in Java, Part 1: Lists, lambdas, and method references,” right now. The second part will be published mid-June.

If you are learning about lambda expressions—or think you know all about them—you might enjoy some quizzes from Mikalai Zaikin and Simon Roberts.

Are there any topics that you want to read about? Drop us a note at javamag_us@oracle.com.

Thank you,
Alan Zeichick
Editor in Chief, Java Magazine
@zeichick

P.S. Oracle is now offering a new cloud-based compute platform, which uses the 64-bit Ampere Altra processor. Here’s how to deploy Java apps on that platform. Check it out!
Quizzes on lambda expressions -Image
Quizzes on lambda expressions
Quiz yourself: Using core functional interfaces
See if you know how to use the predicate, consumer, function, and supplier interfaces.

Quiz yourself: The correct syntax of Java lambda parameters
Be sure to know the difference between identifiers and specifiers.

Quiz yourself: Lambda expressions
Learn the subtleties of using var in lambda expressions.

Quiz yourself: Lambda types
Can a lambda return a lambda?

Quiz yourself: Lambda expressions
Lambdas are essentially expressions that define a class and instantiate an object from that class. Do you know how to use them?
The newest articles
Functional programming in Java, Part 1: Lists, lambdas, and method references
In this republished article, Venkat Subramaniam teaches you everything you need to know about functional programming and Java lambdas.

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