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Articles on Trending Technologies
Technical articles with clear explanations and examples
AbstractSequentialList in Java
The Java Collection Framework contains the AbstractSequentialList class. This class is used to create and implement an unmodifiable list. Also this class implements the Collection interface and the AbstractCollection class.A program that demonstrates this is given as follows −Exampleimport java.util.*; public class Demo { public static void main(String[] args) { AbstractSequentialList list = new LinkedList(); list.add("John"); list.add("Martha"); list.add("Sally"); list.add("Susan"); list.add("Harry"); System.out.println("The elements are: " + list); } }The output of the above program is as follows −OutputThe ...
Read MoreCharBuffer wrap() method in Java
A character array can be wrapped into a buffer using the method wrap() in the class java.nio.CharBuffer. This method requires a single parameter i.e. the char array to be wrapped into a buffer and it returns the new buffer created. If the returned buffer is modified, then the contents of the array are also similarly modified and vice versa.A program that demonstrates this is given as follows −Exampleimport java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { try { ...
Read MoreHow to initialize a vector in C++?
Initialization vector can be done in many ways1) Initialize a vector by push_back() methodAlgorithmBegin Declare v of vector type. Call push_back() function to insert values into vector v. Print “Vector elements:”. for (int a : v) print all the elements of variable a. End.Example#include #include using namespace std; int main() { vector v; v.push_back(6); v.push_back(7); v.push_back(10); v.push_back(12); cout
Read MoreDelete file or directory on termination in Java
A file or directory can be deleted on termination of the program i.e. after the virtual machine terminates using the method java.io.File.deleteOnExit(). This method requires no parameters and it does not return a value.A program that demonstrates this is given as follows −Exampleimport java.io.File; public class Demo { public static void main(String[] args) { try { File file = new File("demo1.txt"); file.createNewFile(); System.out.println("File: " + file); file.deleteOnExit(); } catch(Exception e) { e.printStackTrace(); ...
Read MoreCustom ArrayList in Java
A custom ArrayList can have multiple types of data and its attributes in general are based on the user requirements.A program that demonstrates a custom ArrayList is given as follows −Exampleimport java.util.ArrayList; public class CustomArrayList { int n = 5; class Employee { int eno; String name; Employee(int eno, String name) { this.eno = eno; this.name = name; } } public static void main(String args[]) { int eno[] = {101, 102, 103, 104, ...
Read MoreHow to create Java Priority Queue to ignore duplicates?
The simplest way to create a Java Priority Queue to ignore duplicates is to first create a Set implementation −HashSet set = new HashSet (); set.add(100); set.add(150); set.add(250); set.add(300); set.add(250); set.add(500); set.add(600); set.add(500); set.add(900);Now, create Priority Queue and include the set to remove duplicates in the above set −PriorityQueuequeue = new PriorityQueue(set);Exampleimport java.util.HashSet; import java.util.PriorityQueue; public class Demo { public static void main(String[] args) { HashSetset = new HashSet(); set.add(100); set.add(150); set.add(250); set.add(300); set.add(250); set.add(500); ...
Read MoreWhat are the different types of nested classes are defined in Java?
In Java, it is possible to define a class inside another class, such classes are called Nested classes. We can use the access modifiers like private, public, protected or default for inner classes and default or public access modifiers for outer class.There are two types of nested classes are defined in Java.Static Nested ClassNon-Static Nested ClassStatic Nested ClassWe Can define an inner class as static, so such type of classes is called a static nested class.The nested class is defined with the static keyword, so this type of nested classes doesn’t share any relationship with the instance of an outer class.A static ...
Read MoreHow to fetch elements with iterator in Java?
Let us first create a List and add elements −Listlist = Arrays.asList(new String[] { "P", "Q", "R", "S", "T", "U", "V", "W" });Now, use Iterator to fetch each element −Iteratori = list.iterator();Display the elements −while (i.hasNext()) { System.out.println(i.next()); }Exampleimport java.util.Arrays; import java.util.Iterator; import java.util.List; public class Demo { public static void main(String[] a) { Listlist = Arrays.asList(new String[] { "P", "Q", "R", "S", "T", "U", "V", "W" }); Iteratori = list.iterator(); System.out.println("Displaying elements..."); while (i.hasNext()) { System.out.println(i.next()); } ...
Read MoreWhat is the use of Object.isFrozen() method in JavaScript?
Object.isFrozen()Object.isFrozen() method is used to find whether an object is frozen or not. An object is frozen if it followed the below criteriaIt should not be extensible.Its properties should be non-configurable.It shouldn't accept any new properties.SyntaxObject.isFrozen(obj);Parameters - Object.isFrozen() accepts an object as a parameter and scrutinizes whether it is frozen or not and returns a boolean output.ExampleIn the following example Object.isFrozen() scrutinizes whether the object 'obj' is frozen or not. Since the object is not frozen, false will be displayed as the output. var object = { prop1 : 5 } var res = Object.isFrozen(object); ...
Read MoreArrayBlockingQueue Class in Java
A bounded blocking queue that is backed by an array is known as a ArrayBlockingQueue Class in Java. The size of the queue is fixed in the class and it uses FIFO for ordering elements. The ArrayBlockingQueue Class is a member of the Java Collections Framework.A program that demonstrates this is given as follows −Exampleimport java.util.concurrent.ArrayBlockingQueue; public class Demo { public static void main(String[] args) { int n = 10; ArrayBlockingQueue abQueue = new ArrayBlockingQueue(n); abQueue.add(7); abQueue.add(2); abQueue.add(6); abQueue.add(3); ...
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