A useful resource for those studying OOP concepts in Java has been shared by a developer on Dev.to. The notes, titled "OOPS in JS - Ultimate", provide a comprehensive guide to understanding key concepts such as wrapper classes, constructor chaining, private constructors and singleton classes, polymorphism, encapsulation, nested interfaces, and modifiers types. This resource is intended for those working through OOP concepts in Java, with the goal of saving time and providing quick reference points.

Source: https://dev.to/codexam/oops-in-java-ultimate-3m01