Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
The Java programming language, like many others, is continually evolving. As new features are introduced and improvements are made, certain elements become less relevant or efficient, and alternatives are recommended. The @Deprecated annotation is a tool Java developers use to indicate that a class, method, or field is outdated and there is a better alternative. In this article, we'll explore the @Deprecated annotation in detail, discussing its purpose, usage, and implications for your Java code. Understanding the @Deprecated Annotation The @Deprecated annotation is a marker annotation (meaning it doesn't contain any elements) included in the java.lang package. When applied to ... Read More
Introduction In Android development, writing and reading files are common tasks that developers frequently encounter. The TextWriter class, which belongs to the java.io package, is a powerful tool for writing characters to files. In this article, we delve into the intricacies of using TextWriter in Android with practical examples to guide you. Understanding TextWriter in Android TextWriter is a class in Android used for writing streams of characters. It's an abstract class, meaning you can't instantiate it directly. Instead, you use one of its subclasses, such as FileWriter, OutputStreamWriter, or PrintWriter. One of the main benefits of TextWriter is its ... Read More
Introduction When it comes to text formatting and styling in Android, Spannable strings offer a powerful, flexible approach that goes beyond what can be achieved with simple TextViews. From changing the text color to adding clickable links or even custom fonts, Spannable strings provide a myriad of possibilities. In this guide, we'll explore how to use spans to style text in your Android applications. Understanding Spans In Android, a "span" refers to a way to style text at a character or paragraph level by attaching one or more markup objects to a range of text. The Android framework offers several ... Read More
Introduction Spring Security is a highly customizable authentication and access-control framework for Java applications, particularly for Spring-based applications. Testing these security measures is crucial to ensure a secure application. In this article, we'll explore how to effectively test Spring Security with JUnit, a leading unit testing framework in Java. Understanding Spring Security and JUnit Spring Security is a powerful framework that provides authentication, authorization, and other security features for enterprise-grade applications. It's comprehensive yet flexible, making it suitable for a variety of security requirements. JUnit is a simple, open-source framework used to write repeatable tests in Java. It provides annotations ... Read More
Test-Driven Development (TDD) is a software development approach where tests are written before the actual code. TDD has gained substantial traction due to its emphasis on code quality and maintainability. This article explores how TDD can be effectively implemented using JUnit5 and Mockito, two powerful frameworks in the Java ecosystem. What is Test-Driven Development? Test-Driven Development is an iterative development process where developers first write a test case for a new function or feature, then write the minimum amount of code to pass that test, and finally refactor the code for optimization. This approach enhances the design, reduces bugs, and ... Read More
Introduction Optical Character Recognition (OCR) plays an instrumental role in digitizing printed text, allowing it to be edited, searched, and stored more compactly. One of the most powerful OCR tools available is Tesseract OCR. This article will explore how to use Tesseract OCR with Java, providing detailed examples to enhance your understanding. What is Tesseract OCR? Tesseract OCR is an open-source OCR engine sponsored by Google that can recognize more than 100 languages out of the box. It's widely regarded for its accuracy and adaptability, making it a popular choice for developers across various applications. Integrating Tesseract OCR with Java ... Read More
A collection is a group of elements or objects that are gathered together for some specific tasks. Swift supports three types of collections: Array, Set, and Dictionary. They are implemented as generic collections, also they are clear about what type of values they can store which means you can not store the wrong type of values in the collections. Array It is an ordered collection which is used to store similar types of data or elements. It can store duplicate values. It is both mutable and immutable. Syntax var arr :[Type] = [E1, E2, E3] var arr = ... Read More
In Swift, we are allowed to replace whitespaces with the specified character like $, *, ! etc. So, to replace the spaces of a string with a specific character swift provide the following methods − Using replacingOccurrences() method Using user-defined method Using components() and joined() methods Using split() and joined() methods Using map() and joined() method Method 1: Using the replacingOccurrences() method The replacingOccurrences() method is used to create a string in which all the occurrences of the target string or character are replaced by the specified string or character. Syntax func replacingOccurrences(of: String, with: String) ... Read More
A stack is a data structure which works on LIFO(last in first out) principle. It is used to store and manage data where the recently added item is the first one to be removed from the stack. Stack support the following operations − Push − It is used to add elements to the stack. So in Swift, we achieve push operation by the append() method. Syntax func push(_ items: T) { item.append(items) } Here, the append() function pushes a new element in the item stack. Pop − It is used to remove ... Read More
In Swift, sorting of a string means arranging the characters of the string in the specified order either in ascending or descending order. For example − Input: String = "color of the bird is pink" Output:" bcdefhiiiklnoooprrst" Here, the resultant string is sorted in ascending order. So to sort a string Swift provides an inbuilt function named sorted() function. This function returns a sorted string in which the characters of the string are stored in either ascending or descending order. This function can be defined in two types with and without parameters. ... Read More