What is the difference between HashSet and HashMap classes in collection framework?.What is the difference between ArrayList and Vector classes in collection framework?.What is the difference between ArrayList and LinkedList classes in collection framework?.What are the two ways to iterate the elements of a collection?.Interfaces and its implementations, i.e., classes.The Collection framework represents a unified architecture for storing and manipulating a group of objects. It represents a set of classes and interfaces.What is Collection in JavaĪ Collection represents a single unit of objects, i.e., a group. Java Collection framework provides many interfaces (Set, List, Queue, Deque) and classes ( ArrayList, Vector, LinkedList, PriorityQueue, HashSet, LinkedHashSet, TreeSet). Java Collection means a single unit of objects. Java Collections can achieve all the operations that you perform on a data such as searching, sorting, insertion, manipulation, and deletion. The Collection in Java is a framework that provides an architecture to store and manipulate the group of objects.
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