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JShell

October 5, 2025
 |  No Comments
 |  information, java, jshell, linux, macos, maven, script
JShell is the interactive command-line tool for the Java programming language. It was officially introduced starting with Java 9 (JDK 9) and is a REPL […]

create a STUN server in Linux Ubuntu

September 13, 2025
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 |  console, information, java, macos, nc, netplan, P2P, port, public_ip, server
A PC cannot know its public IP on its own; it needs a third party, that is a STUN server, it’s like a mirror. This […]

Scan an external library in Java Spring Boot

April 20, 2025
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 |  information, maven, spring-boot
It is neat to have configuration classes in a /config folder, located at the same level as the main class: note that the packages: and […]

Testing a Java-injected Springboot service

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 |  information, java, package, spring-boot
You must have the following dependencies, Junit is included, do not add it. you must write down the main class: you must write down the […]

redundant junit dependency

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 |  maven, package, spring-boot
if you have: If you have the following Junit dependency in another version or the same one, you can remove it

Operations for BigInteger and BigDecimal

April 5, 2025
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 |  java, maven, new-library
Java library with Maven. what it does for now:to transform BigInteger to BigDecimal (you specify where the period goes; if you enter an invalid number, […]

create new maven library

April 3, 2025
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 |  information, maven, new-library
The following command creates a Maven project and configures everything: change: To upload to maven-central you must remove -SNAPSHOT from the version, since it is […]

BigInteger and BigDecimal classes in Java

March 30, 2025
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 |  algorithm, information, java
BigInteger BigDecimal BigInteger is used for very large integers, while BigDecimal is used for decimal numbers with defined precision and control. Both classes are essential […]

Install Java, Springboot and Maven on Ubuntu Server

February 2, 2025
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 |  java, linux, maven, server, spring-boot
install java: You should see output similar to: openjdk 19.0.1 2022-10-18 OpenJDK Runtime Environment Temurin-19.0.1+10 (build 19.0.1+10) OpenJDK 64-Bit Server VM Temurin-19.0.1+10 (build 19.0.1+10, mixed […]

ssl certificate in a java spring boot application

January 6, 2025
 |  No Comments
 |  ssl
HTTPS (Hypertext Transfer Protocol Secure) is a secure communication protocol used to transfer data between a web browser and a web server. HTTPS is a […]

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