In Java, the concept of immutable refers to classes whose objects do not change information after they are instantiated. Normally, to declare an immutable class, we would: Declare this class as final so that no class can extend from it. Declare the fields of that… Read More
In the tutorial JDBC transaction management in Spring, I showed you how to configure transaction management using an XML file. We can also use Java code to do this with the @EnableTransactionManagement annotation. How is it in detail? We will find out together in this… Read More
In this tutorial, I show you how to integrate Thymeleaf with Jakarta EE Servlet to replace using JSP in Jakarta EE Servlet applications. First, I will create a new Jakarta EE Servlet Maven project as an example: Thymeleaf dependency is as follows:
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<dependency> <groupId>org.thymeleaf</groupId> <artifactId>thymeleaf</artifactId> <version>3.1.0.M1</version> </dependency> |
I will… Read More
In the previous post, I showed you how to auto component scan using the configuration in the XML file. In this tutorial, I show you how to do this with Java code using the @ComponentScan annotation. First, I will create a new Maven project as… Read More
A problem for applications that use Websocket is when deploying these applications with many different instances, handling requests from users with load balancer, the functionality of the application still works normally, the user still connects to the application and receives messages through Websocket without any… Read More
Socket.IO has 2 main Java implementations Socket.IO Java and Netty-socketio. Netty-socketio only implements Socket.IO 2.x and Socket.IO Java implements the latest version of Socket.IO. Therefore, if you want to implement a Websocket server with Socket.IO using Java, please use the version of Socket.IO Java! In… Read More
RabbitMQ’s Docker Hub page provides us with Docker Images including the Management plugin using Alpine Linux (a Linux version is optimized for a very small size). You can use tags with names ending with management-alpine to install RabbitMQ using Docker Compose. My example is as… Read More
In Java, to prevent the inheritance of a certain class, we will use the final keyword to declare that class. Examples are as follows:
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package com.huongdanjava.javaexample; public final class JavaExample { public static void main(String[] args) { } class Test extends JavaExample { } } |
Class Test will not be able to inherit JavaExample class because this JavaExample class is declared with final: A need… Read More
We often use the Java server runtime to run Java web applications such as Tomcat, Jetty, … From Java version 18, by default, Java also supports us to run a server runtime using the jwebserver command. By default, the jwebserver command will run a web… Read More
Socket.IO is a library that makes us possible to implement a 2-way communication channel between client and server with low latency based on events. We can use Socket.IO to implement a WebSocket server. Originally Socket.IO was written in JavaScript but some other languages are also… Read More
