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.…
Read More Introduction to Reactive ProgrammingIn 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 ExamplesWhen 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 MapJSON (JavaScript Object Notation) is a widely used data interchange format that allows for easy data sharing and communication between systems. In the context of Java, JSON manipulation is crucial because it enables developers to seamlessly handle JSON data within their applications. Whether you are working with APIs, databases, or external data sources, being able…
Read More Java Jackson: Convert JSON Array to Java ListFinding 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 ArrayIn 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…
Read More Ignore Unknown JSON Fields with Java Jacksonclass UserIdComparator implements Comparator<User> { public int compare(User user1, User user2) { if (user1.userId == user2.userId) { return 0; } else if (user1.userId > user2.userId) { return 1; } else { return -1; } } } We will now create a UsernameComparator class that establishes the comparison logic based on the username field. This class…
Read More Comparator interface in JavaIn Java 12 and Java 13, Switch Expressions were added as preview features, and in Java 14 they became a standard feature. The Switch Expressions feature extends regular Java switch statements and can be used as either a statement or an expression. The entire switch block evaluates to a value that can then be assigned…
Read More Java Switch ExpressionsOutput: true true true As you can see, the Car class inherits the Vehicle class, which is itself an instance of the Object class. Similarly, the Car class is an instance of both the Vehicle and the Object class. In Java, all classes inherit some useful methods from the Object class, which we will discuss…
Read More Object Class in JavaReversing a string is a common task in Java programming, and there are several ways to accomplish this. In this tutorial, we’ll explore four different methods for reversing a string in Java, using the StringBuilder class, the for loop, recursion, and a character array. We’ll provide examples of each method and explain how they work.…
Read More Reverse a String in Javapublic int sum(int a, int b, int c) { // body of the method } class Printer { // fields public void printBook(String bookName) { // … } public void printBook(String bookName, int numberOfPages) { // … } } class Printer { // fields public void printBook(String bookName) { // … } public String printBook(String…
Read More Method Overloading in JavaWorking 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