Java allows us to define a class that belongs to another class, for example:
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package com.huongdanjava.javaexample; public class Application { class Builder { } } |
Class is defined inside another class, we call it nested class and this other class is called outer class. In my example above, the Builder is a nested class and… Read More
In the past, when working with Reactive applications that use database, we would usually use a MongoDB database because very few databases supported the Reactive mechanism except MongoDB. But now you do not need to use MongoDB database anymore, Reactive Relational Database Connectivity (R2DBC) will… Read More
In the previous tutorial, I introduced to you the basic ideas of Clean Architecture. In this tutorial, I will go into detail about how to implement Clean Architecture with a Java application! For easy understanding, I will take the student management application example mentioned in… Read More
Clean Architecture is a way of writing code, organizing code introduced by Robert C. Martin. Let’s say that for you to understand, normally, when building a Java project to expose RESTful APIs, we will build a project with many different packages as follows: Inside: The… Read More
In this tutorial, I will show you how to install MySQL Community Server on macOS. Installation First, you need to go to https://dev.mysql.com/downloads/mysql/ to download the MySQL installation file for macOS: There are many different options, but you should choose the .dmg file to install… Read More
The instanceof operator in Java is an operator used to check if this object is an instance of a certain class or interface or not? The return result of this operator will be true if the object is an instance of the class you are… Read More
Usually, when deploying applications to a production environment, we will deploy to many different servers. Managing logs on many servers will cause a lot of difficulties, time, and inefficiencies. It would be better if we used a solution to centralize all of the logging files.… Read More
Kibana is an GUI tool for searching and displaying logs provided by Elasticsearch. In this tutorial, I will guide you to install this tool on CentOS! First, just like when installing Elasticsearch, because by default CentOS does not contain Kibana’s installation package, you need to… Read More
After you have installed Nginx, you can deploy your application to be able to access it using the browser. Access by browser here means we only use domain or IP address with the default port of HTTP is 80 or HTTPS 443 without having to… Read More
Nginx is a web server used to run web pages, similar to the Apache HTTP server with high performance. In this tutorial, I will show you how to install Nginx on CentOS! First, because the CentOS default Repository does not contain Nginx’s installation package, you… Read More
