native2ascii - Native-to-ASCII Converter

Converts a file with native-encoded characters (characters which are non-Latin 1 and non-Unicode) to one with Unicode-encoded characters.

SYNOPSIS

native2ascii [options] [inputfile [outputfile]]

DESCRIPTION

The Java compiler and other Java tools can only process files which contain Latin-1 and/or Unicode-encoded (\udddd notation) characters. native2ascii converts files which contain other character encodings into files containing Latin-1 and/or Unicode-encoded charaters.If outputfile is omitted, standard output is used for output. If, in addition, inputfile is omitted, standard input is used for input.

OPTIONS

-reverse

Perform the reverse operation: convert a file with Latin-1 and/or Unicode encoded characters to one with native-encoded characters. 

-encoding encoding_name

Specify the encoding name which is used by the conversion procedure. The default encoding is taken from System property file.encoding. The encoding_name string must be taken from the first column of the table of supported encodings in the Supported Encodings document.

-Joption

Pass option to the Java virtual machine, where option is one of the options described on the reference page for the java application launcher. For example, -J-Xms48m sets the startup memory to 48 megabytes.

Fonte:
http://docs.oracle.com/javase/1.4.2/docs/tooldocs/windows/native2ascii.html