![]() ![]() Returns an array containing all of the elements in the Collection, using the specified array if it is large enough Returns an array containing all of the elements in the Collection Returns the number of elements in the Collection Preserves only the elements in the Collection that the specified Collection contains Removes all of the elements in the specified Collection from the Collection Removes the specified element from the Collection Returns the maximum value present in the Collection Returns an iterator over the elements in the Collection Returns true if the Collection contains no elements Returns the hash code value for the Collection Returns true if the Collection contains all of the elements in the specified CollectionĬompares the specified object with the other elements in the Collection for equality ![]() Returns true if the Collection contains the specified element ![]() The following is the list of Methods of Java Collections Interface:Īdds a specific element to the CollectionĪdds all the elements of a specific Collection to the Collection The Java Interface comprises certain methods that all Collections can directly use to perform basic operations such as adding, removing, updating, altering and sorting Objects or elements. What are the methods of Java Collections Interface? The following diagram will help you better understand the hierarchy of the Collection Framework: This Interface allows the iterator to rehearse through all the Collections.įurther, all the Collections expand to this Collection Interface, as a result extending the characteristics of the iterator and all methods of this Interface. On the surface of it, Collections Interface is at the root of the Collections Framework that contains an Interface named Iterable Interface. Let’s understand its hierarchy in detail: The Java utility package or Java.util comprises all the Classes and Interfaces for the Collections Framework. It allows the user to operate various data alteration operations like searching, storing, sorting, adding, deleting and updating data on a group of objects. However, the Java Collections Framework provides a ready-made architecture to unify a group of elements or objects in the form of Classes. Thus, although the primary objective of all the Collections was the same and independent, it was difficult for users to remember all the methods, syntaxes and constructors in every Class. However, these collections did not have a shared interface. It provides a method for every Collection, thus building a basis for the Collections Framework.īefore directly jumping onto the details of Java Collections, it is equally important to understand its framework first.īefore the Collections Framework (JDK 1.2), the standard mediums to group Java elements were Arrays, Vectors or Hashtables. However, it is implemented indirectly through various sub-types, such as List, Deque, etc. It is the core Interface implemented by all the Classes in the Collections Framework. It is used exclusively with static methods (provided by Interfaces) that operate on or return Collections common to all Objects. These are user-defined blueprints or prototypes to create objects. Thus, it becomes a single unit of objects that provides numerous Classes.īefore moving forward to the topic, first, let’s understand what Collection Interface and Classes are. The Collection is a one-stop solution that can perform all kinds of operations on data, ranging from searching, storing, inserting, manipulation and deletion. Simply put, it is a pre-structured framework to store and manipulate a group of objects, freeing up the user to concentrate on the important parts of the program rather than on the low-level plumbing. Java Collections is a fundamental part of the Java programming language. Table of ContentsĢ) What is the Java Collections Framework?Ĥ) What are the methods of Java Collections Interface?ĥ) Everything about Java Collections InterfacesĦ) Everything about Java Collections Classesħ) Conclusion An introduction to Java Collections Thus, it is an extra bonus if you want to work with Java, as Java Collections reduces programming efforts.īut how do Collections make Java stand out from the crowd? Read the blog to understand further the Java Collections Framework and its various Interfaces and Classes. It is the reason that Java was the sixth most widely used programming language in 2022, according to Statista. But isn’t it difficult for Developers to learn large amounts of code to achieve such complex tasks? No, it is not the Collections in Java can make this happen through a framework that offers an architecture for storing and managing a collection of objects. Whether you are a techie or not, you might be familiar with Java, a programming language that includes immense codes to develop web applications and software. ![]()
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