ADDITIONAL SYSTEM INFORMATION :
Windows 7 / 10 / JRE 8u331

A DESCRIPTION OF THE PROBLEM :
After updating JRE 8 version version 202, to 331, new FileOutputStream("NUL:") shows "Invalid path or file name".

Original Method:

static {
  NULL_FILE_CHANNEL = AccessController.doPrivileged(new PrivilegedAction < FileChannel > () {
    public FileChannel run() {
      final String osName = System.getProperty("os.name", "unknown").toLowerCase(Locale.US);
      try {
        if (osName.contains("windows")) {
          return new FileOutputStream("NUL:").getChannel();
        } else {
          return new FileOutputStream("/dev/null").getChannel();
        }
      } catch (FileNotFoundException e) {
        throw new IOError(e);
      }
    }
  });

REGRESSION : Last worked in version 8

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
try {
  new FileOutputStream("NUL:").getChannel();
} catch (FileNotFoundException e) {
  e.printStackTrace();
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
new FileOutputStream, to call method "getChannel()"
ACTUAL -
FileNotFoundException

FREQUENCY : always