In this guide, I’ll show you how to create a Fat Jar with Spring Boot. Together, we’ll build a simple ‘UsersMicroservice’, then pack it into a Fat Jar. Don’t worry if you’re new, I’ll guide you step-by-step and answer your top questions along the way. Let’s get started! What is a Fat JAR? A Fat…
Read More Creating a Fat Jar App with Spring BootReactive Programming, a powerful paradigm in modern software development, revolutionizes the way we handle data and events. By embracing reactive principles, developers can build highly responsive and scalable applications. In this tutorial, we will explore the fundamentals of Reactive Programming, its benefits, common use cases, and delve into real-world examples to demonstrate its practical applications.…
Read More Introduction to Reactive ProgrammingWhen working with file management tasks, it is often crucial to obtain a list of files contained within a directory. Python offers several methods and modules specifically designed to efficiently retrieve this information. In this tutorial, we will explore different approaches to effectively list files in a directory using Python. Why is it important to…
Read More Python: List Files in a DirectoryArrays and lists are fundamental data structures in Java that allow you to store collections of elements: Arrays: In Java, an array is a fixed-size, ordered collection of elements of the same type. It provides a contiguous block of memory to store the elements and allows direct access to each element using an index. Arrays…
Read More Convert an Array to a List in JavaIn Java, when we talk about pass-by-value and pass-by-reference, we are referring to how arguments are passed to methods. It is important to have a clear understanding of these concepts as they play a crucial role in Java programming. Understanding pass-by-value and pass-by-reference is crucial in Java programming because it helps prevent confusion and ensures…
Read More Java Pass-by-Value vs Pass-by-ReferenceIn Java programming, converting an int to a String involves transforming a numeric value of type int into its string representation. The string representation allows the number to be treated as a sequence of characters rather than a numerical value. This conversion is particularly useful when you need to concatenate the int value with other…
Read More Convert int to String in JavaJava Regex, also known as Regular Expression, is a powerful tool used for manipulating and managing strings. It consists of a sequence of characters that form a pattern, which can be used to match and locate specific strings within a larger text. In Java, regular expression functionality is provided through the java.util.regex package, which includes…
Read More Java Regex – Regular Expression ExamplesIn this tutorial, you will learn what the @Respository annotation is and how to use it in your Spring Boot applications. @Repository is a Spring annotation that indicates that the decorated class is a repository. A repository is a mechanism for encapsulating storage, retrieval, and search behaviour which emulates a collection of objects. How to…
Read More @Repository Annotation in Spring@Component is a Spring annotation that is used to indicate that a class is a component. Components are objects that make up the structure of an application and are responsible for performing specific tasks. They are typically used to represent services, controllers, repositories, and other types of objects that are used to implement business logic…
Read More @Component Annotation in SpringIn this tutorial, you will learn how to setup Eureka Cluster on your local computer. Although in this tutorial, I am going to setup Eureka Cluster on my local computer, you will still learn what you need to do to make Eureka run on remote server as well. What is Eureka Server Cluster? A Eureka…
Read More Eureka Server Cluster Setup TutorialWhen working with Java programming, it is often essential to determine whether a given string represents a numeric value. This task is crucial for a variety of scenarios, such as validating user input, performing calculations, or processing data. By accurately identifying numeric strings, you can ensure the correctness and integrity of your application’s logic. The…
Read More Java: Check if String is NumericJSON (JavaScript Object Notation) has become a widely used data interchange format due to its simplicity, readability, and compatibility with various programming languages, including Java. It allows developers to represent structured data in a lightweight and human-readable format. In Java applications, JSON is commonly used for data storage, configuration files, and API communication. The objective…
Read More Java: Convert JSON to a MapAccessing elements from an ArrayList is a fundamental operation in Java programming. ArrayLists are commonly used to store and manage collections of objects dynamically. Being able to retrieve elements enables you to work with the data stored within the ArrayList effectively. Whether you need to display elements, perform calculations, or manipulate the data in any…
Read More How to Get an Element from an ArrayList in Java?In this tutorial, you will learn how to convert a JSON array to a Java list using a powerful Java library called Jackson. By the end of this tutorial, you will have a solid understanding of various methods available to achieve this conversion, allowing you to extract meaningful data from JSON arrays and leverage them…
Read More Convert JSON Array to Java List using JacksonThe purpose of this tutorial is to provide a comprehensive guide on updating keys in a HashMap in Java. As Java developers, we often encounter situations where we need to modify the keys associated with certain values in a HashMap. This tutorial aims to equip you with various methods and techniques to update keys efficiently…
Read More Java: Updating Keys in a HashMap