---
name: "gjavah"
section: "1"
platform: "linux"
package: "gcj-jdk"
version: "4:4.9.2-2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/gjavah-4.9"
---

# gjavah(1)

\- generate header files from Java class files

Part of [gjavah-4.9(1)](/gjavah-4.9/1.md).

## NAME

gjavah - - generate header files from Java class files

## SYNOPSIS

gjavah ...

## DESCRIPTION

The **gjavah** program is used to generate header files from class files.  It can generate both CNI and JNI header files, as well as stub implementation files which can be used as a basis for implementing the required native methods.

## OPTIONS

- **-d** *DIR*

  Set output directory.

- **-o** *FILE*

  Set output file (only one of **-d** or **-o** may be used).

- **-cmdfile** *FILE*

  Read command file.

- **-all** *DIR*

  Operate on all class files under directory *DIR*.

- **-stubs**

  Emit stub implementation.

- **-jni**

  Emit JNI stubs or header (default).

- **-cni**

  Emit CNI stubs or header (default JNI).

- **-verbose**

  Set verbose mode.

- **-force**

  Output files should always be written.

Class path options:

- **-classpath** *PATH*

  Set the class path.

- **-I***DIR*

  Add directory to class path.

- **-bootclasspath** *PATH*

  Set the boot class path.

- **-extdirs** *PATH*

  Set the extension directory path.

Standard options:

- **-help**

  Print help text, then exit.

- **-version**

  Print version number, then exit.

- **-J***OPTION*

  Pass argument to the Java runtime.

## BUGS

## SEE ALSO

*javac*(1), ...

## AUTHOR