How to Install Java JDK on Windows 11 Adoptium JDK 21 – Step by Step Tutorial

In this tutorial, I’ll show you exactly how to install the Java JDK (with JRE included) on Windows 11 using the free and open-source Adoptium distribution. We’ll check if Java is already installed, download the correct version, install it step by step, and finally verify the installation. Whether you're a beginner learning Java or setting up your development environment, this guide is for you. ✅ No prior experience needed ✅ Works for Windows 10 and Windows 11 ✅ Includes JRE with the JDK ✅ Uses OpenJDK 21 (LTS) from Adoptium 👍 Like, subscribe, and leave a comment if you have any questions!