Usage:
  javah [options] <classes>
where [options] include:
  -o <file>                Output file (only one of -d or -o may be used)
  -d <dir>                 Output directory
  -v  -verbose             Enable verbose output
  -h  --help  -?           Print this message
  -version                 Print version information
  -jni                     Generate JNI-style header file (default)
  -force                   Always write output files
  -classpath <path>        Path from which to load classes
  -bootclasspath <path>    Path from which to load bootstrap classes
<classes> are specified with their fully qualified names
(for example, java.lang.Object).