Community driven content discussing all aspects of software development from DevOps to design patterns. Instance main methods and unnamed classes, coming in Java 21, will forever change how developers ...

Imagine you are an expert object-oriented Java developer who meticulously crafts code the way an artist cares for their masterpiece. You believe clean code is an absolute necessity. Classes with clear ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes and ...

Here's a quick look at the three types of class loaders and everything you need to know to work with them in your Java programs. Java class loaders are a component of the Java virtual machine (JVM) ...

When I upgrade spring-data-mongodb from 3.1.8 to 3.3.5, I encountered below exception: org.springframework.data.mapping.MappingException: Cannot convert [a, b, c] of type class java.util.ArrayList ...

When generating a swagger documentation for a class extending ArrayList, the schema of the class doesn't have the "items" property. It happens with this particular schema: Here is a demo project using ...

Java is one of the most in-demand programming languages today and is used for the Internet of Things, APIs, in big data technologies, e-commerce websites, scientific applications, and more. It's even ...