In this tutorial, I’m going to create a simple WebSocket server with Java EE that I can use Javascript Websocket API to connect and send/receive messages. I’m going to use Eclipse as the IDE. You can try with another IDE/text editor. However, I would recommend you use Eclipse since I didn’t have much luck with … Read more
In this tutorial, I’m going to show you how to set up Apache Tomcat as a target runtime for Eclipse so you can deploy your web application right from Eclipse. Let’s get started! Download Apache Tomcat There are various Apache Tomcat versions available. The latest version is 10. I’m going to set up version 10 … Read more
Selection sort is one of the simple sorting algorithms. Its time complexity is O(n2). Selection sort fundamental Two nested loops Involves swapping At the end of each iteration, the lowest element is at the right position Selection sort steps As mentioned above, there are two loops in this algorithm. Essentially, the steps as below: Let’s … Read more
Having trouble install oracle database 12c/19c/21c with docker? This step by step tutorial will help you.
Recently, I upgraded Elasticsearch from 7.15.2 to 8.0.1. The setup was quick and simple. However, when making a request to save an entity to the database and in turn make an update to elastic, I got this error. The error message is long, however, the main message is this: “unable to parse response body for … Read more
Since I spent countless hours finding the correct setup for Cucumber, TestContainers and Junit5 (Jupiter) for my Spring Boot project, I hope this tutorial can somehow save you time and help you avoid needless pain. Before you begin, I hope you already know what Cucumber, TestContainers, and Junit5 (and of course Spring Boot) are. If … Read more