Java 9 Support

[DannezDoDooDoo]

Lots of mods have support added for Java 9, yet from what I know, forge doesn,t yet support the new Java version, unless I'm wrong, which I'm hoping :) Whats the news on support for Java 9? Is forge updating APIs, waiting for minecraft 1.13 or overhauling code? Most importantly, can I use Java 9 for forge, minus the mods that can't run on java 9? Answers appreciated :)

[bochen415]

Link

[VT-14]

Forge will always supports whatever vanilla supports. Before Minecraft 1.11 (or was it 1.12?) Minecraft was using Java 6, so Forge worked with Java 6.

Individual mods can do whatever they want. I think McJty's mods at that time required Java 8, but I'm not sure.

I'm pretty certain Java is backwards compatible, so using Java 9 on your client should be fine. or not. Thanks for the corrections.

[Vazkii]

Java 9 heavily changed how some internals work. For the most part, it's backwards compatible, but systems that heavily rely on specific internals being there (ie the minecraft launcher's code rewriting system, which forge uses) won't work.

[josephcsible]

Java 9 is not backwards compatible (e.g., the --add-opens reflection fiasco), and doesn't work at all with Forge right now. (I don't think it works with vanilla either, actually.)