Android Utililty Methods Hash Code Calculate

try {
    MessageDigest md = MessageDigest.getInstance(algorithm);
    InputStream is = new FileInputStream(file);
    byte[] buffer = new byte[8192];
    int read = 0;
    while ((read = is.read(buffer)) > 0) {
        md.update(buffer, 0, read);
    is.close();
    byte[] messageDigest = md.digest();
    return toHexString(messageDigest);
} catch (NoSuchAlgorithmException e) {
    throw new IllegalArgumentException(e);

try {
    MessageDigest md = MessageDigest.getInstance(algorithm);
    byte[] messageDigest = md.digest(input.getBytes());
    return toHexString(messageDigest);
} catch (NoSuchAlgorithmException e) {
    throw new IllegalArgumentException(e);

MessageDigest digest = null;
try {
    digest = java.security.MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
    e.printStackTrace();
digest.update(password.getBytes());
byte messageDigest[] = digest.digest();
...

String result = s;
try {
    MessageDigest digest = MessageDigest.getInstance(algorithm);
    byte[] bytes = digest.digest(s.getBytes());
    BigInteger biggie = new BigInteger(1, bytes);
    result = String
            .format("%0" + (bytes.length << 1) + "x", biggie);
} catch (NoSuchAlgorithmException e) {
...

PBEKeySpec spec = new PBEKeySpec(pin, salt, ROUNDS, KEY_LEN);
Arrays.fill(pin, Character.MIN_VALUE);
try {
    SecretKeyFactory skf = SecretKeyFactory
            .getInstance(KEY_ALGORITHM);
    return skf.generateSecret(spec).getEncoded();
} finally {
    spec.clearPassword();
...

return firstTerm(seed) + (o == null ? 0 : o.hashCode());

return firstTerm(seed) + (x ? 0 : 1);

return firstTerm(seed) + x;

String result = null;
JSONObject json = new JSONObject(hash);
try {
    result = json.toString(2);
} catch (JSONException e) {
    e.printStackTrace();
return result.getBytes();
...

int hash_result = 0;
int w = bitmap.getWidth();
int h = bitmap.getHeight();
hash_result = (hash_result << 7) ^ h;
hash_result = (hash_result << 7) ^ w;
for (int pixel = 0; pixel < 20; ++pixel) {
    int x = (pixel * 50) % w;
    int y = (pixel * 100) % h;
...