Java Utililty Methods Random String

Random random = new Random();
int randomName = random.nextInt(99999999);
return "" + randomName;

return getRandomString(MIN_LEN, MAX_LEN);

StringBuilder builder = new StringBuilder();
for (int i = 0; i < 10; i++) {
    builder.append(chars[random.nextInt(chars.length)]);
return builder.toString();

return getRandomString(15);

String chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
StringBuilder sb = new StringBuilder();
Random r = new Random();
while (sb.length() < 12) {
    int index = (int) (r.nextFloat() * chars.length());
    sb.append(chars.charAt(index));
return sb.toString().toLowerCase();
...

StringBuffer randStr = new StringBuffer();
for (int i = 0; i < 3; i++) {
    int number = getRandomNumber();
    char ch = CHAR_LIST.charAt(number);
    randStr.append(ch);
return randStr.toString();

StringBuilder sb = new StringBuilder();
for (int i = 0; i < 5; i++) {
    sb.append(components[random.nextInt(components.length)]);
sb.append(random.nextInt());
String result = sb.toString();
if (result.length() > 9) {
    result = result.substring(0, 9);
...

return getRandomString(DEFAULT_LEN);

return randomstring(6, 15);

StringBuilder sb = new StringBuilder();
int max = CHARACTORS.length();
for (int i = 0; i < len; i++) {
    sb.append(CHARACTORS.charAt(RANDOM_GENERATOR.nextInt(max)));
return sb.toString();