Regex to replace characters that Windows doesn’t accept in a filename

since no answer was good enough i did it myself. hope this helps 😉

public static boolean validateFileName(String fileName) {
    return fileName.matches("^[^.\\\\/:*?\"<>|]?[^\\\\/:*?\"<>|]*") 
    && getValidFileName(fileName).length()>0;
}

public static String getValidFileName(String fileName) {
    String newFileName = fileName.replace("^\\.+", "").replaceAll("[\\\\/:*?\"<>|]", "");
    if(newFileName.length()==0)
        throw new IllegalStateException(
                "File Name " + fileName + " results in a empty fileName!");
    return newFileName;
}