How can i convert a file in ASCii/Dos format to ASCii/Unix format in Java ?

are you looking for tools? on unix / linux you can use commands like unix2dos and dos2unix

No , i wanna code it. If would be good if i can pass charset type to the stream but i don't know if there is a charset encoding for ascii/ unix in java. Does anyone knows?

You can use iconv.

iconv --from-code=ISO-8859-1 --to-code=UTF-8 myfile > newfile

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thanks daniok, i've leared about iconv tool by this occasion but i really ned a java solution.
I have already converted other types of charset like ascii -> epcdic with the code below but i don't know how to do the same between ascii/dos and ascii/windows.

      try 
      {
         File fichierSource = new File(p_UrlFichierSource);
         FileInputStream streamFichierSource = new FileInputStream(fichierSource);
         Reader readerStreamFichierSource = new InputStreamReader(streamFichierSource, "ASCII");
         BufferedReader bReader = new BufferedReader(readerStreamFichierSource);
 
         File fichierDestination = new File(p_UrlFichierDestination);
         FileOutputStream streamFichierDestination = new FileOutputStream(fichierDestination);
         Writer writerStreamFichierDestination = new OutputStreamWriter(streamFichierDestination, "CP500");
         BufferedWriter bWriter = new BufferedWriter(writerStreamFichierDestination);
         
         int ch;
         while ((ch = bReader.read()) > -1) 
         {
            bWriter.write((char) ch);
         }
         
         bReader.close();
         bWriter.close();
 
      } 
      catch (Exception e) 
      {
         e.printStackTrace();
      }

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