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Install Java JDK 21 on Windows 11 (2026) — Set JAVA_HOME & Run First Hello World
In this step-by-step tutorial, I walk you through installing Java JDK 21 on Windows 11 from scratch — including JAVA_HOME, PATH configuration, and verifying everything works with your first Hello World program. ⏱️ Chapters: 0:00 — Intro 0:13 — JRE vs JDK: Which One Do You Need? 0:41 — Downloading Java 21 from Oracle 1:08 ...
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