Execute Scheduled Task Only Once in Spring Boot
Usually, we configure tasks to run periodically. However, there are situations where we may need to schedule a task to execute just once at a specified future time, such as for resource initialization...
View ArticleAn Introduction to Contract Testing in Java with Pact
In modern microservice architectures, communication between services is key. However, ensuring that services interact correctly can be challenging, especially when they evolve independently. This is...
View ArticleMocking an Enum Using Mockito
When writing unit tests in Java, there are scenarios where we need to mock certain classes or behaviors to isolate and test specific functionality. While mocking objects in Java is straightforward with...
View ArticleProperty-Based Testing in Java with jqwik: Practical Examples
Testing is a critical aspect of software development, and traditional unit testing often focuses on specific inputs and outputs. Property-based testing, however, takes a broader approach by verifying...
View ArticleJUnit 5 vs. TestNG vs. Spock: Mastering Java Testing
Unit testing is an essential practice in software development, ensuring that individual components of your code work as expected. With several frameworks available in the Java ecosystem, choosing the...
View ArticleJava Interface vs Annotation @interface
In Java, both interface and @interface are used to define a contract for classes, but they serve different purposes. Let us delve into understanding Java interface vs annotation. 1. Interface An...
View ArticleJava File To Two Dimensional Array
Handling data files is a common task in many Java applications, especially when working with structured data like tables or matrices. Let us delve into understanding how to work with a Java file...
View ArticleMastering Mocking in Spock: Clean and Maintainable Tests
When it comes to testing in Java, Spock is a powerful and expressive framework that combines simplicity with an intuitive syntax. Among its many features, Spock’s approach to mocking and stubbing...
View ArticleJava Implicit Classes & Instance Main
Java, one of the most widely used programming languages, has seen continuous evolution over the years. One of the lesser-known features of Java is the use of implicitly declared classes and instance...
View ArticleHow to Parse XML from a String in Java
When working with XML in Java, it’s common to parse XML from a file using classes like DocumentBuilder and DocumentBuilderFactory. However, there are scenarios where XML needs to be parsed directly...
View ArticleUsing Java’s ForkJoin Framework for Parallel Processing
Parallel processing is a critical tool for optimizing performance in modern applications, especially when handling large datasets or computationally intensive tasks. Java’s ForkJoin Framework,...
View ArticleJava’s Modern Toolbox: Records, Sealed Classes, and Pattern Matching
Java has been a steadfast player in the programming world for decades. However, recent updates have shown that Java isn’t just resting on its laurels—it’s evolving to meet modern development needs....
View ArticleQuery JPA Single Table Inheritance
In Java Persistence API (JPA), inheritance mapping provides a way to map Java class hierarchies to database tables. Single Table Inheritance is one of the inheritance strategies where all entities in a...
View ArticleJava float to int Conversion
In Java, converting a float to an int is a common operation that is often required when dealing with numeric data. Since float is a floating-point data type, it can hold decimal values, whereas int can...
View ArticleFuzz Testing in Java: A Beginner’s Guide to Security
In today’s digital landscape, software security is not just a priority—it’s a necessity. Applications face threats from every angle, and developers must ensure their systems can handle not only valid...
View Articlejava.lang.classnotfoundexception: com.mysql.cj.jdbc.driver Resolved
The error java.lang.classnotfoundexception: com.mysql.cj.jdbc.driver occurs when your Java application cannot locate the MySQL JDBC driver class at runtime. This issue is common in projects involving...
View ArticleInsert a Number Into a Sorted Array Example
1. Introduction Manipulating sorted arrays is a common requirement in Java applications that maintain ordered collections either for efficient retrieval or ranking. In this example, I will show two...
View ArticleEnhancing Java Testing with PIT: A Guide to Mutation Testing
In software development, ensuring code quality is a critical component of creating robust, maintainable applications. Traditional testing approaches like unit and integration testing are essential, but...
View ArticleJava Input Handling: Read Multiple Integers from One Line
Using the Scanner class is a common way to read user input in Java. However, if you are trying to read multiple integers from a single line of input, you might encounter issues like only retrieving the...
View ArticleSpring Boot Test Mock @value
In Spring Boot, the @Value annotation is widely used to inject values from property files, environment variables, or other external sources into the application. Testing components that use @Value...
View Article