Java Utililty Methods URL Read

int responseCode = con.getResponseCode();
InputStream stream;
if (responseCode / 100 == 2) {
    stream = con.getInputStream();
} else {
    stream = con.getErrorStream();
if (stream != null) {
...

URLConnection uc = url.openConnection();
if (uc instanceof java.net.HttpURLConnection) {
    java.net.HttpURLConnection huc = (java.net.HttpURLConnection) uc;
    int code = huc.getResponseCode();
    if (code >= java.net.HttpURLConnection.HTTP_BAD_REQUEST) {
        throw new IOException("open HTTP connection failed.");
int len = uc.getContentLength();
InputStream in = new BufferedInputStream(uc.getInputStream());
byte[] b;
try {
    if (len != -1) {
        b = new byte[len];
        while (len > 0) {
            int n = in.read(b, b.length - len, len);
            if (n == -1) {
                throw new IOException("unexpected EOF");
            len -= n;
    } else {
        b = new byte[8192];
        int total = 0;
        while ((len = in.read(b, total, b.length - total)) != -1) {
            total += len;
            if (total >= b.length) {
                byte[] tmp = new byte[total * 2];
                System.arraycopy(b, 0, tmp, 0, total);
                b = tmp;
        if (total != b.length) {
            byte[] tmp = new byte[total];
            System.arraycopy(b, 0, tmp, 0, total);
            b = tmp;
} finally {
    in.close();
return b;

URLConnection urlconnection = url.openConnection();
if (urlconnection instanceof HttpURLConnection) {
    if (((HttpURLConnection) urlconnection).getResponseCode() >= 400)
        throw new IOException("open HTTP connection failed.");
int i = urlconnection.getContentLength();
BufferedInputStream bufferedinputstream = new BufferedInputStream(urlconnection.getInputStream());
byte abyte0[];
...

if ((srcUrl != null)) {
    HttpURLConnection conn = (HttpURLConnection) srcUrl.openConnection();
    conn.setRequestMethod("GET");
    conn.connect();
    int responseCode = conn.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        byte tmp_buffer[] = new byte[4096];
        InputStream is = conn.getInputStream();
...

int nFileLength = -1;
try {
    URL url = new URL(sURL);
    HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
    int responseCode = httpConnection.getResponseCode();
    if (responseCode >= 400) {
        System.err.println("Error Code : " + responseCode);
        return -2; 
...

HttpURLConnection conn = null;
try {
    conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("HEAD");
    conn.getInputStream();
    return conn.getContentLength();
} catch (IOException e) {
    return -1;
...

URL url = new URL(urlString.replace(" ", "%20"));
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.connect();
int responseCode = conn.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
    return conn.getContentLength();
} else {
...

URL url = new URL(URL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.addRequestProperty("User-Agent", "Mozilla/4.76");
int code = conn.getResponseCode();
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = rd.readLine()) != null) {
...

StringBuilder pageHTML = new StringBuilder();
try {
    URL url = new URL(pageURL);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestProperty("User-Agent", "MSIE 7.0");
    BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));
    String line = null;
    while ((line = br.readLine()) != null) {
...

StringBuilder result = new StringBuilder();
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setRequestMethod("GET");
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
    result.append(line);
reader.close();
return result.toString();