How to install Java 21

What is Java?

Java is a programming language, but in this context, we are refering to JVM (Java virtual machine).

w3schools

When we compile a Java program, then bytecode is generated. Bytecode is the source code that can be used to run on any platform [via JVM].

Source: https://www.w3schools.in/java/java-virtual-machine/

abbriviations

• JDK - Java Development Kit
• JRE - Java Runtime Environment

Java version 21

Currently, the app requires JDK 21 or higher to compile.

How to download JDK 21?

JDK 21 can be downloaded at various websites. Here are some of them:

Distributor	Note	Link to download
OpenJDK	Worst WebUI	https://jdk.java.net/archive/
Adoptium (Eclipse Temurin)	More options	https://adoptium.net/temurin/releases/
Oracle	Featuristic; Support latest version	https://www.oracle.com/java/technologies/downloads/

In this article, we will guide you through Oracle website, since they have the most up-to-date Java and website is easy enough to navigate.

Download page contains just enough information about the version you're about to download:

• Version of Java
  

• Operating system
  

Chosing the right package

Oracle offers various method to install Java on your machine from executable file to compressed archive.

Linux

• Better to install by your package manager
• Use compressed archive if you now what you're doing.

Mac

• Intel chips use x64 package, M chips use ARM64
• Use compressed archive if you now what you're doing.

Windows

• You should download Installer package. MSI Installer is for older machines.
• Use compressed archive if you now what you're doing.

note

In the future, this section will be replaced with actual video going through the installation process.