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Convert between String and Timestamp 1. Overview Timestamp is one of a few legacy date-time objects in Java. In this tutorial, we’ll see how to parse from a String value to a Timestamp object and how to format a Timestamp object to a String. And since Timestamp relies on a Java-proprietary format,… Continue Reading java-string-to-timestamp
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Arrays in Java: A Reference Guide 1. Introduction In this tutorial, we’ll deep dive into a core concept in the Java language – arrays. We’ll first see what’s an array, then how to use them; overall, we’ll cover how to: Get started with arrays Read and write arrays elements Loop over… Continue Reading java-arrays-guide
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How to use the Spring FactoryBean? 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 can produce objects themselves, which are managed by the framework. And, simply put, we can build a factory bean… Continue Reading spring-factorybean
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An Introduction to Epsilon GC: A No-Op Experimental Garbage Collector 1. Introduction Java 11 introduced a No-Op Garbage Collector called Epsilon, which promises the lowest GC overhead possible. In this short tutorial, we’ll explore how Epsilon works, and we’ll mention the common use cases. 2. Quick Hands-On Let’s start with… Continue Reading jvm-epsilon-gc-garbage-collector
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Using Guava CountingOutputStream 1. Overview In this tutorial, we’re going to look at the CountingOutputStream class and how to use it. The class can be found in popular libraries like Apache Commons or Google Guava. We’re going focus on the implementation in the Guava library. 2. CountingOutputStream ==== 2.1.… Continue Reading guava-counting-outputstream
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Threads vs Coroutines in Kotlin 1. Introduction In this quick tutorial, we’re going to create and execute threads in Kotlin. Later on, we’ll discuss how to avoid it altogether, in favor of Kotlin Coroutines. 2. Creating Threads Creating a thread in Kotlin is similar to doing so in Java. We… Continue Reading kotlin-threads-coroutines
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Reloading Properties Files in Spring 1. Overview In this tutorial, we’re going to show how to reload properties in a Spring application. 2. Reading Properties in Spring We have different options to access properties in Spring: Environment — We can inject Environment and then use Environment#getProperty to read a given property.… Continue Reading spring-reloading-properties
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Spring Data with Spring Security 1. Overview Spring Security provides a good support for integration with Spring Data. While the former handles security aspects of our application, the latter provides convenient access to the database containing the application’s data. In this article, we’ll discuss how Spring Security can be integrated… Continue Reading spring-data-security
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Vavr Tutorial Vavr is a functional library for Java 8+ that provides immutable data types and functional control structures. Note that functional programming is not only a new set of tools to get accustomed with but also a new paradigm to understand. So let’s jump into it. Vavr Basics +… Continue Reading vavr-tutorial
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A Guide to JUnit 5 Extensions 1. Overview In this article, we’re going to take a look at the extension model in the JUnit 5 testing library. As the name suggests, the purpose of Junit 5 extensions is to extend the behavior of test classes or methods, and these can… Continue Reading junit-5-extensions
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