Java Libraries for iOS¶

This track enables Java libraries to be first-class components in iOS projects, callable from Objective-C/Swift.

Requirements¶

Explicit export model – annotate or map Java methods/classes to be exposed to iOS.
Code generation – auto-generate native glue (C/Objective-C headers, shims, registration code) packaged with the native library.
Runtime bridging – native entry points that call the JVM embedding API, handle threading, and manage lifetimes.
Data marshaling rules – primitives, strings, arrays, objects, callbacks, exceptions.
Packaging – produce iOS deliverables (static library / xcframework + headers or Xcode module).

// Java
public class HelloLib {
    @ExportToNative("greet")
    public static String greet(String name) { return "Hello " + name; }
}

would result in

// Generated native header
const char* HelloLib_greet(const char* name);

Call from Objective-C/Swift like any native function.