Collections class in Java is one of the utility classes in the Java Collections Framework. The java .util package contains the Collections class in Java . The Java Collections class is used with the static methods that operate on the collections or return the collection . All the methods of this class throw a NullPointerException if the collection or object passed to the methods is null. Example 1: Here, we will use ArrayList, which is a class from the Java Collections framework. It allows for ... Java provides built-in collection classes like List, Set, Map and Queue, so developers don’t need to write their own data management algorithms. The Collection Framework improves productivity by making code more reusable, maintainable and faster to develop. Learn how to use the Java Collections Framework to manage groups of objects efficiently and effectively. Explore the different types of collections, such as Lists, Sets, Queues, and Maps, and their key methods, implementations, and performance. Java Collections is a very vast topic and as a beginner can be difficult to navigate your way while learning it. Here we have everything you need to know while starting off with Java Collections . What is a Collection Framework? We have our collection of objects, now we need an organized way to use these collections , therefore we need a framework.
