The header file provides the signature of the C function defined in the Java file. Javah utility creates the header file and provides the signature of the native method.

Exception in thread "main" java.lang.IllegalStateException: java.util.zip.ZipException: zip END header not found at org.springframework.boot.loader.ExecutableArchiveLauncher.

When using a Node.js client app with the 'https' package, it requires the 'Content-Length' header to be set, otherwise the Azure Functions Java app will receive a 'null' body.

The header file provides the signature of the C function defined in the Java file. Javah utility creates the header file and provides the signature of the native method.

Per-Åke Minborg, Consulting Member of Technical Staff, Java Core Libraries at Oracle, presented “Function and Memory Access in Pure Java” at JavaOne 2025. Minborg demonstrated how the Foreign ...

OpenJDK proposal to reduce the Java object header by half or more would lower memory and CPU usage on all Java workloads.