Ars Technica

Java: ArrayList.contains(Object o) isn't calling the correct equals method

It's not terribly clean, but you could use indexOf() and check if it returns -1. Better than breaking out a loop.
InfoWorld

Java XML and JSON: Document processing for Java SE, Part 2: JSON-B

In this article, we’ll continue exploring XML and JSON in Java 11 and beyond. Examples in this article will introduce you to JSON-B, the JSON Binding API for Java. After a quick overview and ...