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 SpringThe purpose of this tutorial is to address a common issue that many Java developers encounter when working with the Scanner class. Specifically, we’ll discuss the challenge of using nextLine() after calling nextInt(). When utilizing the Scanner class to read input from the user, it’s not uncommon to encounter unexpected behavior when calling nextLine() immediately…
Read More Handling Scanner’s nextLine() after nextInt()The java.lang.OutOfMemoryError is a runtime exception in Java that occurs when the Java Virtual Machine (JVM) exhausts all available memory and is unable to allocate more memory to fulfill the memory requirements of an application. This error indicates that the application has run out of heap space and is unable to create new objects or…
Read More java.lang.OutOfMemoryError: Resolving Memory Management IssuesThe java.sql.SQLException: No Suitable Driver Found error is a common issue encountered when working with Java Database Connectivity (JDBC) to establish a connection with a database. This error typically occurs when the JDBC driver required to connect to a specific database is not found or not properly configured in the application. It is an indication…
Read More Resolving java.sql.SQLException: No Suitable Driver FoundThe “Too Many Clients” issue in PostgreSQL occurs when the number of concurrent client connections exceeds the configured maximum limit. When this happens, the PostgreSQL server is unable to accept any new connections, leading to the org.postgresql.util.PSQLException: FATAL error. This error message indicates that the database server has reached its maximum capacity for handling client…
Read More PostgreSQL: FATAL Error – Dealing with ‘Too Many Clients’Dates and times play a critical role in many Java applications. They are used for various purposes such as scheduling tasks, logging events, data analysis, and working with databases. Java provides several classes and libraries to handle date and time-related operations efficiently. In this tutorial, you will learn about the difference between java.util.Date and java.sql.Date.…
Read More java.util.Date vs java.sql.DateJDBC (Java Database Connectivity) is a fundamental technology for connecting Java applications to databases. It provides a standardized API that enables developers to interact with various database systems seamlessly. However, like any technology, JDBC is not immune to errors and issues. Resolving errors related to JDBC is crucial for maintaining the stability and functionality of…
Read More Troubleshooting JDBC Errors