Author: alegru

Reactive 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.…

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In 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…

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Java 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 Examples

When 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 Numeric

JSON (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 Map

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 Jackson

Finding the maximum and minimum values in an array is a common requirement in various programming scenarios. It allows you to extract key insights from your data, such as identifying the highest and lowest values, or determining the range of values present. This knowledge can be utilized in numerous applications, including statistical analysis, data processing,…

Read More Finding Max and Min Values in a Java Array

In this tutorial, we will explore how to ignore unknown JSON fields in Java using Jackson. We will cover the default behaviour, ignoring unknown properties on a class level, ignoring unknown properties globally, and how to deal with incomplete JSON. Additionally, we will discuss security concerns related to ignoring unknown properties using annotations. If you’re…

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Working with strings is a fundamental aspect of programming, and Java provides a rich set of tools and methods for manipulating strings. One common task when working with strings is to remove whitespace characters such as spaces, tabs, and newlines. There are several ways to accomplish this in Java, including using the replaceAll() method from…

Read More Removing Whitespaces in Java Strings