ForceJava21

ForceJava21

A somehow stupid and cursed mod that forces you to launch Minecraft with Java 21 (and, if you are on 1.16.5, Forge 36.2.41 + is required).

If you are trying to launch Minecraft with Java 20 or below, the following texts will appear in your log, and the game will stop immediately.

Please use Java 21 (and Forge 36.2.41+) to launch Minecraft.
Current Java version:  yourJavaVersion. Current Forge version:  yourForgeVersion
Recommendations: 
Zulu: https://www.azul.com/downloads/?version=java-21-lts&package=jdk#zulu
Oracle: https://www.oracle.com/java/technologies/downloads/#java21
Temurin: https://adoptium.net/temurin/releases/?version=21

But... how can you launch 1.16.5 forge with Java 21?

You can. For details, see #9825.

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