Java Utililty Methods Random String

byte[] symbols = "abcdefghijklmnopqrstuvwxyz0123456789".getBytes();
Random random = new Random();
byte[] buffer = new byte[stringLength];
for (int i = 0; i < stringLength; i++) {
    buffer[i] = symbols[random.nextInt(symbols.length)];
return new String(buffer);

Random rand = new Random();
String sb = "";
for (int i = 0; i < wordsLength; i++) {
    int randomWord = rand.nextInt(words.length);
    if (i != 0) {
        sb += separator;
    sb += words[randomWord];
...

return random.ints(48, 122).filter(i -> (i < 57 || i > 65) && (i < 90 || i > 97)).mapToObj(i -> (char) i)
        .limit(length).collect(StringBuilder::new, StringBuilder::append, StringBuilder::append).toString();

StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < size; i++) {
    char letter = (char) ((byte) 'A' + (byte) random.nextInt(26));
    stringBuilder.append(letter);
return stringBuilder.toString();

StringBuilder sb = new StringBuilder();
for (int i = 0; i < (rnd.nextInt(maxLength) + 1); i++) {
    sb.append(alphabet[rnd.nextInt(alphabet.length)]);
return sb.toString();

String encoder = null;
if (str == null || str.trim().length() == 0) {
    encoder = _CHARTECER;
} else {
    encoder = str.trim();
StringBuilder randomString = new StringBuilder();
int limit = encoder.length();
...

return genRandomString(rand.nextInt(10));

byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
    data[i] = pickupAlphabet();
return new String(data);

return genRandomString(count, DEFAULT_CHARS);

if (namePrefix.length() > MAX_RESOURCE_LENGTH) {
    return String.format("%s%d", namePrefix.substring(0, MAX_RESOURCE_LENGTH).toLowerCase(),
            new Random().nextInt(1000000));
} else {
    return String.format("%s%d", namePrefix.toLowerCase(), new Random().nextInt(1000000));