1. Overview Inheritance and composition — along with abstraction, encapsulation, and polymorphism — are cornerstones of object-oriented programming (OOP). In this tutorial, we’ll cover the basics of inheritance […]
1. Introduction The Java assert keyword allows developers to quickly verify certain assumptions or state of a program. In this article, we’ll take a look at how to […]
1. Introduction to Class Loaders Class loaders are responsible for loading Java classes during runtime dynamically to the JVM (Java Virtual Machine). Also, they are part of […]
1. Overview Java 9 introduces a new level of abstraction above packages, formally known as the Java Platform Module System (JPMS), or “Modules” for short. […]
1. Overview This quick article will be an intro to using the synchronized block in Java. Simply put, in a multi-threaded environment, a race condition occurs when two or […]
1. Overview Support for try-with-resources — introduced in Java 7 — allows us to declare resources to be used in a try block with the assurance that the resources […]
1. Overview In this article, we are discussing the Spring org.springframework.beans.factory.NoSuchBeanDefinitionException – this is a common exception thrown by the BeanFactory when trying to resolve a bean that simply isn’t defined in […]
1. What Is a Circular Dependency? It happens when a bean A depends on another bean B, and the bean B depends on the bean […]
1. Overview In this quick tutorial, we’ll explain Spring’s UnsatisfiedDependencyException, what causes it, and how to avoid it. 2. Cause of UnsatisfiedDependencyException UnsatisfiedDependencyException gets thrown when, as the […]
1. Overview In this quick article, we’re going to show different approaches of injecting prototype beans into a singleton instance. We’ll discuss the use cases and […]
1. Introduction In this quick tutorial, we’ll take a look at Spring’s method-level dependency injection support, via the @Lookup annotation. 2. Why @Lookup? A method annotated with @Lookup tells Spring […]
1. Overview There are two kinds of beans in the Spring bean container: ordinary beans and factory beans. Spring uses the former directly, whereas latter […]
1. Introduction Lombok is an extremely useful library overcoming boilerplate code. If you are not familiar with it yet, I highly recommend taking a look […]
1. Overview In this tutorial, we’ll see how to inject Spring beans by generic parameters. 2. Autowiring Generics in Spring 3.2. Spring supports injection of generic […]
1. Introduction In this tutorial, we’re going to show how to inject Java collections using the Spring framework. Simply put, we’ll demonstrate examples with the List, Map, Set collection interfaces. 2. List With @Autowired […]
1. Overview In this quick tutorial, we’ll learn about the different types of bean scopes in the Spring framework. The scope of a bean defines […]
1. Introduction In this basic tutorial, we’ll learn how to do simple XML-based bean configuration with the Spring Framework. 2. Overview Let’s start by adding […]
1. Overview In this tutorial, we’re going to learn about Spring’s @Order annotation. The @Order annotation defines the sorting order of an annotated component or bean. It has an optional […]
1. Overview In this quick tutorial, we’ll discuss Spring’s @Primary annotation which was introduced with version 3.0 of the framework. Simply put, we use @Primary to give higher preference to […]
1. Overview In this Spring Framework tutorial, we’ll demonstrate how to use annotations related to dependency injection, namely the @Resource, @Inject, and @Autowired annotations. These annotations provide classes with […]
