Java Utililty Methods SHA1

final MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
try (InputStream is = new BufferedInputStream(new FileInputStream(file))) {
    final byte[] buffer = new byte[1024];
    for (int read = 0; (read = is.read(buffer)) != -1;) {
        messageDigest.update(buffer, 0, read);
return sha12String(messageDigest);
...

if (null == data) {
    throw new IllegalArgumentException("null string");
try {
    final MessageDigest md = MessageDigest.getInstance("SHA-1");
    return toHexString(md.digest(data.getBytes()));
} catch (final NoSuchAlgorithmException e) {
    return null;
...

byte[] sha1hash = new byte[40];
try {
    final MessageDigest md = MessageDigest.getInstance("SHA-1");
    md.update(str.getBytes(StandardCharsets.UTF_8));
    sha1hash = md.digest();
} catch (final NoSuchAlgorithmException e) {
    e.printStackTrace();
return toHex(sha1hash);

try {
    final MessageDigest m = MessageDigest.getInstance("SHA-1");
    m.update(string.getBytes(), 0, string.length());
    return new BigInteger(1, m.digest()).toString(16);
} catch (NoSuchAlgorithmException e) {
    return "";

try {
    final byte[] bytesOfMessage = text.getBytes("UTF-8");
    final MessageDigest md = MessageDigest.getInstance("SHA1");
    final byte[] digest = md.digest(bytesOfMessage);
    return new String(digest);
} catch (Exception e) {
    throw new RuntimeException();

final MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(text.getBytes("iso-8859-1"), 0, text.length());
final byte[] sha1hash = md.digest();
return sha1hash;

try {
    byte[] b = todigest.getBytes("UTF-8");
    MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
    return sha1.digest(b);
} catch (UnsupportedEncodingException e) {
    throw new Error(e);
} catch (NoSuchAlgorithmException e) {
    throw new Error(e);
...

MessageDigest crypt = sha1.get();
crypt.reset();
byte[] buf = new byte[4 * 1024];
int len;
while ((len = in.read(buf)) > 0) {
    Thread.yield();
    crypt.update(buf, 0, len);
in.close();
return crypt.digest();

try {
    if (messageDigest == null) {
        throw new Exception("messageDigest is null or text is null");
    if (texts == null || texts.length == 0)
        return null;
    if (texts[0] == null)
        return null;
...

if (object == null) {
    throw new Exception("Object is null.");
String input = String.valueOf(object);
MessageDigest md;
try {
    md = MessageDigest.getInstance("SHA1");
} catch (NoSuchAlgorithmException ex) {
...