Java Utililty Methods URL to File Name

String fileName = conn.getHeaderField("Content-Disposition");
Matcher matcher = REGEX_FILE_NAME.matcher(fileName);
if (matcher.find()) {
    return matcher.group(1);
return null;

URL url;
try {
    url = new URL(urlStr);
} catch (MalformedURLException ex) {
    System.err.println("Invalid URL: " + urlStr); 
    assert false;
    return null;
String[] urlParts = url.getPath().split("\\/");
return urlParts[urlParts.length - 1];

String[] urlpaths;
try {
    URL url = new URL(urlString);
    urlpaths = url.getPath().split("/");
} catch (Exception e) {
    return null;
return urlpaths[urlpaths.length - 1];
...

URL url = null;
try {
    url = new URL(urlString);
    return new File(url.getFile()).getName();
} catch (MalformedURLException e) {
    return new File(urlString).getName();

String filename = "";
String path = extUrl.getPath();
String[] pathContents = path.split("[\\\\/]");
if (pathContents != null) {
    int pathContentsLength = pathContents.length;
    System.out.println("Path Contents Length: " + pathContentsLength);
    for (int i = 0; i < pathContents.length; i++) {
        System.out.println("Path " + i + ": " + pathContents[i]);
...

String s = url.getFile();
return decodeURL(s, "UTF8");

String[] pathElements = url.getPath().split("/");
return pathElements[pathElements.length - 1];

return new File(URLDecoder.decode(url.getFile(), "UTF-8")).getName();

String fileName = url.getFile();
if (fileName.lastIndexOf('?') != -1) {
    fileName = fileName.substring(fileName.lastIndexOf('/') + 1, fileName.lastIndexOf('?'));
} else {
    fileName = fileName.substring(fileName.lastIndexOf('/') + 1);
return URLDecoder.decode(fileName);

return url.getPath().substring(stripResource(url.getPath()).length());