JDK 1.1 and later.
native2ascii [ options ] [ inputfile [ outputfile ]]
javac can only process files encoded in ASCII, with any other characters encoded using the \uxxxx Unicode notation. native2ascii is a simple program that reads a Java source file encoded using a local encoding and converts it to the ASCII-plus-encoded-Unicode form required by javac.
The inputfile and outputfile are optional. If unspecified, standard input and standard output are used, making native2ascii suitable for use in pipes.
Specifies the encoding used by source files. If this option is not specified, the encoding is taken from the file.encoding system property.
Specifies that the conversion should be done in reverse--from encoded \uxxxx characters to characters in the native encoding.