JVM APIs

Elide compiles Java and Kotlin with its bundled javac and kotlinc and runs the program on the bundled JDK in a separate process. The program can use the JDK, the Kotlin standard library, the libraries listed below and its own Maven dependencies.

// Versions.kt
fun main() {
  println("JDK ${Runtime.version().feature()}, Kotlin ${KotlinVersion.CURRENT}")
}

elide run Versions.kt

JDK 25, Kotlin 2.5.0

Single-file runs

elide run Main.java or elide run Main.kt outside a project compiles against this classpath:

Kotlin files compile with the kotlinx.serialization and atomicfu compiler plugins. A Kotlin file cannot import Metro; use a project for that.

Inside a project directory (one with an elide.pkl, or below one), a single file also gets that project’s dependencies.

Projects

elide build, elide run and elide test add these libraries to Kotlin source sets. Java source sets get only the JUnit libraries on test sets. The switches go in kotlin.features, except JUnit’s: jvm.features.testing, which removes the bundled JUnit compile APIs and runtime when false; JVM test runs then need junit-platform-console in testPackages.

A Java project adds Elide annotations as a compileOnly dependency; see Elide annotations. Other bundled libraries are linked from the binary, without a download, when a project declares them at the bundled version; see Bundled libraries.

elide classpath prints the main classpath; elide classpath test:compile prints what a test set adds.

Not available

Reference

Samples

• Kotlin coroutines
• Kotlin JSON serialization
• Java with a Maven dependency
• Elide annotations in Kotlin