Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Object Oriented Programming Articles
Page 309 of 589
How can we Implement a Queue using Stack in Java?
This article will discuss how to implement a Queue using a Stack in Java. It will briefly introduce the Queues and Stacks, and provide a suitable example that shows their implementation. Queues in Java In Java, the Queue class extends the Collection interface, and it supports the insert and remove operations using a FIFO (First-in-First-Out). The last element added to the end of the queue can become the first element to be removed from the queue. The following diagram will give you a better understanding of the Queue: Stacks in Java In Java, a Stack is a subclass (child class) ...
Read MoreAdd all the elements from a collection to the HashSet in Java
HashSet in Java implements the Set interface, which belongs to the Java Collections Framework and is a part of the java.util package. It stores unique elements, which means we cannot store any duplicate (appearing more than once) values in a HashSet. The given task is to add all the elements of another collection to a HashSet object in Java. For example, if we have a collection ArrayList with elements [1, 3, 4, 5, 5]. Our task is to add all these elements to a HashSet, maybe to remove duplicates from the list, or for any other reason. Adding Elements from ...
Read MoreAdd months to current date using Calendar.add() method in Java
The given task is to add months to a date (object) using the add() method of the Calendar class. For example, if we need to add 5 months to the date: 26-06-2025, the new date would be 26-11-2025. Calendar.add() method in Java The calender.add() method in Java is used to add a specified amount of time to any field of the Calendar. Using this method, we can add months, years, days, etc. This method accepts two parameters: the first one is the field we want to add to, and the second one is the amount we want to ...
Read MoreAdd elements to HashMap in Java
HashMap is a part of the Java Collections Framework, it is available in java.util package. It implements the Map interface, and it is used for storing two values at a time: a key and a value. The HashMap key is used to access the associated value. A Java HashMap is similar to a dictionary, where we have a word (key) and its meaning is considered as a value. In this article, we will learn how to add elements to a HashMap in Java Programming. The following are the ways to add elements to a HashMap in Java: Using ...
Read MoreHow to check multiple regex patterns against an input? Using Java.
In Java, the strings that are used to find the pattern are known as regular expressions. In this article, we will learn to check multiple regex patterns against an input, and it can be done by using 2 approaches. Using Metacharacter Using the List object Using Metacharacter The meta character "|" in Java regular expressions allows you to match more than one regular expression. For example, if you need to match a particular input text with more than one expression, you need to separate them using the following: exp1|exp2|exp3 Example ...
Read MoreAdd a value to Pair Tuple in Java
By default, Java does not have built-in tuple support; to use the tuple, we use the third-party library called Javatuples. Using this library, you can create a tuple of different sizes, starting from a single-element tuple, which is the Unit class, up to a ten-element tuple (Decade class). The following is the list of JavaTuples library classes: Unit: 1 element tuple Pair: 2 element tuple Triplet: 3 element tuple Quartet: 4 element tuple Quintet: 5 element tuple ...
Read MoreWhat are local variables in C++?
The variables, which are declared inside a function, block or method are known as local variables in C++. Their scope is limited to that function or block and can be accessed and used only within the area or scope they are defined. You cannot access or use them outside their scope. This is mainly used to prevent conflicts with other variables in other parts of the program and to efficiently manage memory. Key Characteristics of Local Variables Scope Limited : These variables are declared inside block or scope (usually {}) and are only visible and used ...
Read MoreHow to write the first C++ program?
C++ is a high level programming language that is used to develop applications, work with operating systems, and much more. It is an extension of the C language, which combines both procedural programming (available in C) and object oriented programming. In this article, we will learn step by step the procedure of writing our first C++ program. Prerequist For this, make sure that your computer consists of the following two. C++ Compiler Text Editor or IDE Get a C++ Compiler It is a system that translates the source code (written ...
Read MoreC++ Programming Language Features
C++, also said to be a middle-level language, as it is a combination of both high-level features like abstraction with low-level language features like memory manipulation capabilities of assembly. It is a superset of C, as it compromises both C with object-oriented, therefore any valid C program will also be valid to C++ program.Top Features of C++ Programming Language C++ runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX. In this following article we will discuss some of the features of C++ that make it stand out among other programming languages: 1. ...
Read MoreAdd a value in Ennead Tuple in Java
By default, Java does not have built-in tuple support; to use the tuple, we use the third-party library called Javatuples. Using this library, you can create a tuple of different sizes, starting from a single-element tuple, which is the Unit class, up to a ten-element tuple (Decade class). The following is the list of JavaTuples library classes: Unit: 1 element tuple. Pair: 2 element tuple. Triplet: 3 element tuple Quartet: 4 element tuple Quintet: 5 element tuple ...
Read More