What is the main difference between Collection and Collections in Java

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Collections is a utility class  meaning that it defines a set of methods that perform common  often re-used functions  such as sorting a list  rotating a list  finding the minimum value etc  And these common methods are defined under static scope   Collection is an interface that is implemented by AbstractCollection which in turn is implemented by AbstractList  AbstractSet etc   Also  Collections class has thirty-two convenience implementations of its collection interfaces  providing unmodifiable collections  synchronized collections  Nearly all of these implementations are exported via static factory methods in one noninstantiable class  java util Collections    Reference  Effective Java

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Collection is a base interface for most collection classes  it is the root interface of java collection framework   Collections is a utility class   Collections class is a utility class having static methods It implements Polymorphic algorithms which operate on collections

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Yes  Collections is a utilty class providing many static methods for operations like sorting    whereas Collection in a top level interface

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Collection is a interface which is used to represent group of individual object as a single entity   Collections is an utility class present in java util  package to define several utility method  like sorting searching   for collection object

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Collection is a interface and Collections is class in Java util package

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Collection is an interface containing List  Set and Queue   Collections is a class containing useful methods like Collections sort   and  Collections synchronizedlist    etc

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Collection is a base interface for most collection classes  whereas Collections is a utility class  I recommend you read the documentation

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Are you asking about the Collections class versus the classes which implement the Collection interface   If so  the Collections class is a utility class having static methods for doing operations on objects of classes which implement the Collection interface  For example  Collections has methods for finding the max element in a Collection   The Collection interface defines methods common to structures which hold other objects  List and Set are subinterfaces of Collection  and ArrayList and HashSet are examples of concrete collections

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collection   A collection with small  c   represents a group of objects elements   Collection   The root interface of Java Collections Framework   Collections   A  utility class that is a member of the  Java Collections Framework

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The Collections class is a utility class having static methods for doing operations on objects of classes which implement the Collection interface  For example  Collections has methods for finding the max element in a Collection

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Collection is an Interface which can used to Represent a Group of Individual object as a single Entity   Collections is an utility class to Define several Utility Methods for Collection object

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Collections is a class which has some static methods and that method returns the collection  Collection is an interface rather than root interface in collection hierarchy

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Collection is an root interface of Java collection framework  Collections is a utility class which contains static methods  example Collections sort

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Collection  as its javadoc says is  The root interface in the collection hierarchy   This means that every single class implementing Collection in any form is part of the Java Collections Framework   The Collections Framework is Java s native implementation of data structure classes  with implementation specific properties  which represent a group of objects which are somehow related to each other and thus can be called a collection   Collections is merely an utility method class for doing certain operations  for example adding thread safety to your ArrayList instance by doing this   List list   Collections synchronizedList new Arraylist      The main difference in my opinion is that Collection is base interface which you may use in your code as a type for object  although I wouldn t directly recommend that  while Collections just provides useful operations for handling the collections

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As per Java Doc Collection is    The root interface in the collection hierarchy  A collection represents a group of objects  known as its elements  Some collections allow duplicate elements and others do not  Some are ordered and others unordered  The JDK does not provide any direct implementations of this interface  it provides implementations of more specific subinterfaces like Set and List  This interface is typically used to pass collections around and manipulate them where maximum generality is desired     Where as Collections is    This class consists exclusively of static methods that operate on or return collections  It contains polymorphic algorithms that operate on collections   wrappers   which return a new collection backed by a specified collection  and a few other odds and ends

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Collection  as its javadoc says is  The root interface in the collection hierarchy   This means that every single class implementing Collection in any form is part of the Java Collections Framework   The Collections Framework is Java s native implementation of data structure classes  with implementation specific properties  which represent a group of objects which are somehow related to each other and thus can be called a collection   Collections is merely an utility method class for doing certain operations  for example adding thread safety to your ArrayList instance by doing this   List lt MyObj gt  list   Collections synchronizedList new Arraylist lt MyObj gt        The main difference in my opinion is that Collection is base interface which you may use in your code as a type for object  although I wouldn t directly recommend that  while Collections just provides useful operations for handling the collections

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Collection is an interface from which other class forms like List  Set are derived  Collections  with  S   is a utility class having static methods to simplify work on collection  Ex   Collections sort

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collection is an interface and it is a root  interface for all classes and interfaces like set list and map         and all the interfaces can implement collection interface   Collections is a class that can also implements collection interface

[java] What is the main difference between Collection and Collections in Java?

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