What is a collection interface?

A Collection represents a group of objects known as its elements. The Collection interface is used to pass around collections of objects where maximum generality is desired.

What are the interfaces in the collections API?

Consistent API: The API has a basic set of interfaces like Collection, Set, List, or Map, all the classes (ArrayList, LinkedList, Vector, etc) that implement these interfaces have some common set of methods.

What is collection API?

The Collection API is the framework that provides an architecture to the stores and manipulate the group of projects and basically it is a package of data structures that includes Array lists, Linked lists, Hash sets, etc. A collection is simply an object that groups multiple elements into a single unit.

What is the root interface of the collections API?

Iterable interface
The Iterable interface is the root interface for all the collection classes. The Collection interface extends the Iterable interface and therefore all the subclasses of Collection interface also implement the Iterable interface.

What is the icollection interface in system.collections?

Collection Base System. Collections. Concurrent. Blocking Collection System. Collections. Concurrent. Concurrent Bag System. Collections. Concurrent. Concurrent Dictionary

Where do I find the collection interface in Java?

The java.util package contains all the classes and interfaces for the Collection framework. There are many methods declared in the Collection interface. They are as follows:

How does the icollection interface extend IEnumerable?

The ICollection interface extends IEnumerable; IDictionary and IList are more specialized interfaces that extend ICollection. An IDictionary implementation is a collection of key/value pairs, like the Hashtable class. An IList implementation is a collection of values and its members can be accessed by index, like the ArrayList class.

Which is less used, the Iterable interface or the collection interface?

It is less used. The Iterable interface is the root interface for all the collection classes. The Collection interface extends the Iterable interface and therefore all the subclasses of Collection interface also implement the Iterable interface. It contains only one abstract method. i.e., It returns the iterator over the elements of type T.