buck2 : Is java supported as a part of buck2 about buck2

[nagwww]

This is the config I tried for creating a hello world application in Java

 java_binary(
    name = "main",
    main_class = "Main",
    deps = [":print"],
)

java_library(
    name = "print",
    srcs = ["Main.java"],
) 

Using the latest version of buck2 ( Downloaded from https://github.com/facebook/buck2/releases/tag/latest ) This was updated like 14 hours back.

$ ./buck2-x86_64-apple-darwin build //:main

Getting the following error

buck2-x86_64-apple-darwin build //:main
File changed: prelude//toolchains/demo.bzl
Build ID: e40e9b95-b558-4faf-a75d-00db9f8cc0ab
Jobs completed: 4. Time elapsed: 0.1s.
BUILD FAILED
Error running analysis for `root//:main (prelude//platforms:default#f6691640831d48dd)`

Caused by:
    0: Error looking up configured node root//:main (prelude//platforms:default#f6691640831d48dd)
    1: Error looking up configured node toolchains//:java (prelude//platforms:default#f6691640831d48dd) (prelude//platforms:default#f6691640831d48dd)
    2: looking up unconfigured target node `toolchains//:java`
    3: Unknown target `java` from package `toolchains//`.
       Did you mean one of the 9 targets in toolchains//:BUCK?
       Maybe you meant one of these similar targets?
         toolchains//:cxx
         toolchains//:go
         toolchains//:ocaml
         toolchains//:rust

I was trying to look at the examples provided for cxx and implement the same for java. cxx works great for the example provided here https://github.com/facebook/buck2/blob/main/examples/hello_world/BUCK

It looks like it has rules in prelude folder, but no toolchain wrapper for java.

Was really hoping to get some guidance / pointer to create a wrapper for java. Hoping to send out a PR to buck2 so this would help out the buck2 community.

Thanks and looking forward to get some guidance on creating a toolchain/wrapper for java.

Kind regards,
Nag