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Guide to System.gc() 1. Overview In this tutorial, we’re going to investigate the System.gc() method located in the java.lang package. Explicitly calling System.gc() is known for being a bad practice. Let’s try to understand why and if there are any use cases when calling this method might be useful. [[garbage… Continue Reading java-system-gc
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A Guide to JUnit 5 1. Overview JUnit is one of the most popular unit-testing frameworks in the Java ecosystem. The JUnit 5 version contains a number of exciting innovations, with the goal to support new features in Java 8 and above, as well as enabling many different styles of… Continue Reading junit-5
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Java KeyStore API 1. Overview In this tutorial, we’re looking at managing cryptographic keys and certificates in Java using the KeyStore API. 2. Keystores If we need to manage keys and certificates in Java, we need a keystore, which is simply a secure collection of aliased entries of keys and certificates. We typically… Continue Reading java-keystore
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Find All Pairs of Numbers in an Array That Add Up to a Given Sum 1. Overview In this quick tutorial, we’ll show how to implement an algorithm for finding all pairs of numbers in an array whose sum equals a given number. We’ll focus on two approaches to the… Continue Reading java-algorithm-number-pairs-sum
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Java Web Weekly, Issue 137 At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since. Here we go… 1. Spring and Java ===== >> Updated Spring 5.0 Roadmap and Reactive Story Presented at… Continue Reading java-web-weekly-137
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MongoDB BSON Guide 1. Introduction In this tutorial, we’ll be looking at BSON and how we can use it to interact with MongoDB. Now, an in-depth description of MongoDB and all of its capabilities is beyond the scope of this article. However, it’ll be useful to understand a few key… Continue Reading mongodb-bson
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Lists in Groovy 1. Overview In Groovy, we can work with lists just like we do in Java. But, with its support for extension methods, it ships with quite a bit more. In this tutorial, we’ll look at Groovy’s take on mutating, filtering and sorting lists. 2. Creating Groovy Lists… Continue Reading groovy-lists
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AWS Lambda With Java 1. Introduction AWS Lambda is a serverless computing service provided by Amazon to reduce the configuration of servers, OS, Scalability, etc. AWS Lambda is capable of executing code on AWS Cloud. It runs in response to events on different AWS resources, which triggers AWS Lambda functions.… Continue Reading java-aws-lambda
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Two Factor Auth with Spring Security 1. Overview In this tutorial, we’re going to implement Two Factor Authentication functionality with a Soft Token and Spring Security. We’re going to be adding the new functionality into an existing, simple login flow and use the Google Authenticator app to generate the tokens.… Continue Reading spring-security-two-factor-authentication-with-soft-token
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Introduction to Spring REST Shell 1. Overview In this article, we’ll have a look at Spring REST Shell and some of its features. It’s a Spring Shell extension so we recommend reading about it first. 2. Introduction The Spring REST Shell is a command-line shell designed to facilitate working with… Continue Reading spring-rest-shell
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