![]() ![]() It is at the top level of the Collection framework hierarchy.Given below is the list of interfaces in the Collection framework: Collection Interface in Java The different Interfaces and their implementations (Classes) in the Collection framework? These are the methods for performing actions on objects that implement the collection interface, such as searching and sorting. They implement the methods of the interfaces. These are the implementation of the collection interface. These are abstract data types that are used to represent collections. Thus, you need to import the package to use Collection classes and interfaces in Java. The package or java.util contains all the interfaces and their implementation known as classes and algorithms for the Collection framework. How is the Collection framework available in Java? You can perform many operations such as insertion, deletion, searching, sorting, etc.It also provides flexibility since its size can be expanded according to the user’s requirements.By using the collections framework, you can store both homogenous and heterogeneous data.The advantages of using collections are listed below: What are the advantages of the Collections framework? You can easily store and manipulate the data by performing operations such as searching, sorting, insertion, deletion, and traversing. With the use of Collections, you can write your code quickly and efficiently. i.e.A Collection is defined as a single unit of objects and a framework is a ready-made architecture that provides a set of interfaces and classes. Interface also implement the Iterable interface. Interface extends the Iterable interface and therefore all the subclasses of Collection The Iterable interface is the root interface for all the collection classes. It removes the last elements returned by the iterator. ![]() It returns the element and moves the cursor pointer to the next element. It returns true if the iterator has more elements otherwise it returns false. There are only three methods in the Iterator interface. Iterator interface Iterator interface provides the facility of iterating the elements in a forward direction only. It returns the hash code number of the collection. It generates a Spliterator over the specified elements in the collection. It returns a sequential Stream with the collection as its source. It returns a possibly parallel Stream with the collection as its source. Here, the runtime type of the returned array is that of the specified array. It is used to search the specified collection in the collection. It removes the total number of elements from the collection. It returns the total number of elements in the collection. It is used to delete all the elements of invoking collection except the specified collection. It is used to delete all the elements of the collection that satisfy the specified predicate. It is used to delete all the elements of the specified collection from the invoking collection.ĭefault boolean removeIf(Predicate filter) It is used to delete an element from the collection. It is used to insert the specified collection elements in the invoking collection. It is used to insert an element in this collection. There are many methods declared in the Collection interface. The java.util package contains all the classes and interfaces for the Collection framework. ![]() Let us see the hierarchy of Collection framework.
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