Alex is a Java developer who’s been coding for a few years. His code works, but something feels… messy. Every time he needs to filter a list, he writes a loop. Every time he needs a background task, ...

Get started with Java streams, including how to create streams from Java collections, the mechanics of a stream pipeline, examples of functional programming with Java streams, and more. You can think ...

Big O describes how an algorithm’s cost grows with input size. It is an upper bound that abstracts hardware and constants so you can compare designs, reason about scalability, and anticipate ...

There are many ways to do anything in Java, and there is no conclusive right way. Often, the right way is simply the way you know best. Imperative loops like the for loop are the most basic way to do ...

There are many reasons you might find yourself needing to create an image gallery – whether it’s to show off album covers for a music app, to present feature images for articles in a feed, or to ...