For example, the The Java collections framework provides various interfaces. These interfaces include several methods to perform different operations on collections.<\/p>\n\n\n\n We will learn about these interfaces, their subinterfaces, and implementation in various classes in detail in the later chapters. Let’s learn about the commonly used interfaces in brief in this tutorial.<\/p>\n\n\n\n The Java does not provide direct implementations of the\u00a0 People often get confused between the collections framework and The As mentioned earlier, the All the methods of the Here are the subinterfaces of the The\u00a0 The\u00a0 The\u00a0 In Java, the\u00a0 In Java, the\u00a0 The Java collections framework provides various data structures and algorithms that can be used directly. This has two main advantages:<\/p>\n\n\n\n Moreover, the collections framework allows us to use a specific data structure for a particular type of data. Here are a few examples,<\/p>\n\n\n\n Before we wrap up this tutorial, let’s take an example of the\u00a0ArrayList class\u00a0of the collections framework.<\/p>\n\n\n\n The Output<\/strong>:<\/p>\n\n\n\n In the later tutorials, we will learn about the collections framework (its interfaces and classes) in detail with the help of examples.<\/p>\n","protected":false},"excerpt":{"rendered":" In this tutorial, we will learn about different interfaces of the Java collections framework. The Java collections framework provides a set of interfaces and classes to implement various data structures and algorithms. For example, the LinkedList class of the collections framework provides the implementation of the doubly-linked list data structure. Interfaces of Collections FrameWork The Java collections framework provides […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[584],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1249"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=1249"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1249\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=1249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=1249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=1249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}LinkedList<\/code> class of the collections framework provides the implementation of the doubly-linked list data structure.<\/p>\n\n\n\n
\n\n\n\nInterfaces of Collections FrameWork<\/h2>\n\n\n\n
![\"Interfaces](\"https:\/\/cdn.programiz.com\/sites\/tutorial2program\/files\/Java-Collections.png\")
<\/figure>\n\n\n\n
\n\n\n\nJava Collection Interface<\/h2>\n\n\n\n
Collection<\/code> interface is the root interface of the collections framework hierarchy.<\/p>\n\n\n\nCollection<\/code>\u00a0interface but provides implementations of its subinterfaces like\u00a0List<\/code>,\u00a0Set<\/code>, and\u00a0Queue<\/code>.<\/p>\n\n\n\nCollections Framework Vs. Collection Interface<\/h3>\n\n\n\n
Collection<\/code> Interface.<\/p>\n\n\n\nCollection<\/code> interface is the root interface of the collections framework. The framework includes other interfaces as well: Map<\/code> and Iterator<\/code>. These interfaces may also have subinterfaces.<\/p>\n\n\n\n
\n\n\n\nSubinterfaces of the Collection Interface<\/h2>\n\n\n\n
Collection<\/code> interface includes subinterfaces that are implemented by Java classes.<\/p>\n\n\n\nCollection<\/code> interface are also present in its subinterfaces.<\/p>\n\n\n\nCollection<\/code> Interface:<\/p>\n\n\n\nList Interface<\/h3>\n\n\n\n
List<\/code>\u00a0interface is an ordered collection that allows us to add and remove elements like an array.<\/p>\n\n\n\nSet Interface<\/h3>\n\n\n\n
Set<\/code>\u00a0interface allows us to store elements in different sets similar to the set in mathematics. It cannot have duplicate elements.<\/p>\n\n\n\nQueue Interface<\/h3>\n\n\n\n
Queue<\/code>\u00a0interface is used when we want to store and access elements in\u00a0First In, First Out<\/strong>\u00a0manner.<\/p>\n\n\n\n
\n\n\n\nJava Map Interface<\/h2>\n\n\n\n
Map<\/code>\u00a0interface allows elements to be stored in\u00a0key\/value<\/strong>\u00a0pairs. Keys are unique names that can be used to access a particular element in a map. And, each key has a single value associated with it.<\/p>\n\n\n\n
\n\n\n\nJava Iterator Interface<\/h2>\n\n\n\n
Iterator<\/code>\u00a0interface provides methods that can be used to access elements of collections.<\/p>\n\n\n\n
\n\n\n\nWhy the Collections Framework?<\/h2>\n\n\n\n
Set<\/code> interface provided by the collections framework.<\/li>Map<\/code> interface.<\/li>ArrayList<\/code> class provides the functionality of resizable arrays.<\/li><\/ul>\n\n\n\n
\n\n\n\nExample: ArrayList Class of Collections<\/h2>\n\n\n\n
ArrayList<\/code> class allows us to create resizable arrays. The class implements the List<\/code> interface (which is a subinterface of the Collection<\/code> interface).<\/p>\n\n\n\n\/\/ The Collections framework is defined in the java.util package\nimport java.util.ArrayList;\n\nclass Main {\n public static void main(String[] args){\n ArrayList<String> animals = new ArrayList<>();\n \/\/ Add elements\n animals.add(\"Dog\");\n animals.add(\"Cat\");\n animals.add(\"Horse\");\n\n System.out.println(\"ArrayList: \" + animals);\n }\n}<\/code><\/pre>\n\n\n\nArrayList: [Dog, Cat, Horse]\n<\/samp><\/pre>\n\n\n\n