secp256k1-jdk is a modern, functional-style Java API with two implementations for Java, JDK, GraalVM native-image, Kotlin, Scala, etc. It aims to be the standard library for secp256k1 in the greater JDK/JVM Bitcoin ecosystem. Thanks to Andreas Schildbach and @craigraw for their help! Version 0.2 is now available for early integration testing. Binaries are available in a GitLab Maven repo, but remember: "Don't trust. Verify." This is an experimental pre-release.