Java Utililty Methods URL Exist

if (isUrl(fileorUrl)) {
 if (fileorUrl.startsWith("http")) {
 return existsHttp(fileorUrl);
 } else {
 try {
 URL url = new URL(fileorUrl);
 try {
 URLConnection uc = url.openConnection();
...

try {
 return exists(new URL(url));
} catch (Exception e) {
 return false;

HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.setRequestMethod("HEAD");
huc.connect();
return (huc.getResponseCode() == HttpURLConnection.HTTP_OK);

if ("http".equals(url.getProtocol())) {
 HttpURLConnection cnx = (HttpURLConnection) url.openConnection();
 return (HttpURLConnection.HTTP_OK == cnx.getResponseCode());
} else if ("file".equals(url.getProtocol())) {
 File f = new File(url.getPath());
 return f.exists();
throw new UnsupportedOperationException("only 'http' and 'file' protocol supported :" + url.getProtocol());
...

try {
 HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 connection.setRequestMethod("HEAD");
 return connection.getResponseCode() == HttpURLConnection.HTTP_OK;
} catch (IOException e) {
 return false;

try {
 HttpURLConnection.setFollowRedirects(false);
 HttpURLConnection con = (HttpURLConnection) new URL(URLName).openConnection();
 con.setRequestMethod("HEAD");
 con.setConnectTimeout(10000);
 int code = con.getResponseCode();
 boolean ex = (code == HttpURLConnection.HTTP_OK);
 p("Exists url " + URLName + ", code: " + code + "= " + ex);
...

try {
 HttpURLConnection.setFollowRedirects(true);
 HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
 connection.setRequestMethod("HEAD");
 return (connection.getResponseCode() == HttpURLConnection.HTTP_OK
 || connection.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT);
} catch (Exception e) {
 System.out.println("Error accessing: " + url);
...

HttpURLConnection.setFollowRedirects(false);
HttpURLConnection conn = null;
boolean SUCCESS = false;
try {
 conn = (HttpURLConnection) new URL(url).openConnection();
 conn.connect();
 DataInputStream ins = new DataInputStream(new BufferedInputStream(conn.getInputStream()));
 ins.close();
...