Difference Between Collection And Collections In Java
Understanding the Difference Between Collection and Collections in Java
Difference Between Collection And Collections In Java
In Java, “Collection” is an interface that represents a group of objects known as elements. It is a generic term used to refer to different types of collection classes, such as lists, sets, and maps, that store and manipulate multiple elements. On the other hand, “Collections” is a utility class in Java that contains various static methods to operate on objects of type Collection. These methods provide functionalities like sorting, searching, and synchronizing collection elements. So, while a “Collection” represents a group of objects, “Collections” provides utility methods to work with collections in Java.
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1 - Collection in Java:
In Java, Collection is an interface that represents a group of objects known as elements.
It is part of the Java Collections Framework that provides a unified architecture for representing and manipulating collections of objects.
Collection interface does not provide any concrete implementation, but it serves as a base interface for other specific collection types like List, Set, Queue, and Map.
2) Collections in Java:
In Java, Collections (with an ‘s’) is a utility class that consists of various static methods for operating on objects of type Collection.
The Collections class provides methods like sort, reverse, shuffle, min, and max to manipulate collections and perform common operations on them.
It acts as a companion class to the Collection interface, offering static utility methods to work with collections effectively.
3) Key differences:
Collection is an interface that defines the behavior of a group of objects, while Collections is a utility class that provides static methods to work with collections efficiently.
Collection represents a single group of objects, whereas Collections class provides utility methods to manipulate collections.
Collection interface is a part of the Java Collections Framework, serving as a foundation for specific collection types, whereas the Collections class is a standard utility class in Java.
Collection interface is implemented by specific collection classes like List, Set, and Map, while the Collections class contains static methods for common operations on collections.
Understanding the distinction between Collection and Collections is crucial for effectively working with collections in Java programs.
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