FileOutputStream is not creating filename with UTF-8 encoding (JAVA)

Question

I am generating a pdf which should be named something like this, "ウェブドメイン.pdf", but when I pass this filename into the FileOutputStream, it doesn't created the expected filename with UTF-8 encoding but instead it creates a file with a name like ???????.pdf.

I am using the following code to do the same, and I don't understand why is it behaving like this.

 String fileName="ウェブドメイン.pdf";
 FileOutputStream fileOutputStream = new FileOutputStream(new String(fileName.getBytes("UTF-8"),"UTF-8"));
 PdfWriter writer = PdfWriter.getInstance(document,fileOutputStream);

Anyone having ideas on how to solve this problem. Any help will be appreciated.

Answer 1

In a Unix system, native code libraries seemingly pull the encoding information from LC_CTYPE environment variables to determine file encoding, instead of getting the value from -Dfile.encoding=utf-8 java system setting.

If you export LANG=en_US.UTF-8 your system environment, the native parts of java stack will treat your UTF filenames accordingly.