Certification courses in Python, Java, SQL, HTML, CSS, JavaScript and DSA. Try Programiz PRO! Tutorials Examples Courses Try Programiz PRO Java Introduction Get Started With Java Your First Java Program Java Comments Java Fundamentals Java Variables and Literals Java Data Types (Primitive) Java ...
The Map interface of the Java collections framework provides the functionality of the map data structure. Working of Map In Java, elements of Map are stored in key/value pairs. Keys are unique values associated with individual Values. A map cannot contain duplicate keys. And, each key is ...
Example 1: Implementation of ListIterator In the example below, we have implemented thenext(),nextIndex()andhasNext()methods of theListIteratorinterface in anarray list. importjava.util.ArrayList;importjava.util.ListIterator;classMain{publicstaticvoidmain(String[] args){// Creating an ArrayListArrayL...
Implementation of SortedSet in TreeSet Class importjava.util.SortedSet;importjava.util.TreeSet;classMain{publicstaticvoidmain(String[] args){// Creating SortedSet using the TreeSetSortedSet<Integer> numbers =newTreeSet<>();// Insert elements to the setnumbers.add(1); numbers.add(2); numbers...
Implementation of SortedMap in TreeMap Class importjava.util.SortedMap;importjava.util.TreeMap;classMain{publicstaticvoidmain(String[] args){// Creating SortedMap using TreeMapSortedMap<String, Integer> numbers =newTreeMap<>();// Insert elements to mapnumbers.put("Two",2); ...
Certification courses in Python, Java, SQL, HTML, CSS, JavaScript and DSA. Try Programiz PRO! Tutorials Examples Courses Try Programiz PRO Java Introduction Get Started With Java Your First Java Program Java Comments Java Fundamentals Java Variables and Literals Java Data Types (Primitive) Java ...
In this tutorial, we will learn about the Java Iterator interface with the help of an example. All the Java collections include an iterator() method. This method returns an instance of iterator used to iterate over elements of collections.
In Java, we must importjava.util.Queuepackage in order to useQueue. // LinkedList implementation of QueueQueue<String> animal1 =newLinkedList<>();// Array implementation of QueueQueue<String> animal2 =newArrayDeque<>();// Priority Queue implementation of QueueQueue<String> animal3 =newPriorityQ...
Java Enum and Interface As we have learned, we cannot inherit enum classes in Java. However, enum classes can implement interfaces. Example: enum implementing interface interface Pizza { public void displaySize(); } enum Size implements Pizza { SMALL, MEDIUM, LARGE, EXTRALARGE; public void disp...