Java Utililty Methods Random Number

String s = "";
s.toCharArray();
return getRandom(len, NUMSLETTER_A_F);

StringBuffer sbuffer = new StringBuffer("");
Random r = new Random();
for (int i = 0; i < length; i++) {
    sbuffer.append(ENCODE_TABLE[r.nextInt(62)]);
return sbuffer.toString();

int randomInt = 0;
Random randomGenerator = new Random();
randomInt = randomGenerator.nextInt(CHAR_LIST.length());
if (randomInt - 1 == -1) {
    return randomInt;
} else {
    return randomInt - 1;

int[] array = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Random rand = new Random();
for (int i = 10; i > 1; i--) {
    int index = rand.nextInt(i);
    int tmp = array[index];
    array[index] = array[i - 1];
    array[i - 1] = tmp;
int result = 0;
for (int i = 0; i < 6; i++)
    result = result * 10 + array[i];
System.out.println(result);
return result;

Random rand = new Random();
int min = 1;
int max = 32768;
int num = rand.nextInt(max - min + 1) + min;
return num;

return RANDOM.nextInt(10000);

Random random = new Random();
long n = (long) (100000L + random.nextFloat() * 900000L);
return new Long(n).toString();

return from + (int) Math.floor(random.nextDouble() * ((to + 1) - from));

Random rand = new Random();
return rand.nextInt((maxInt - minInt) + 1) + minInt;

Random r = new Random();
int randNum = r.nextInt(new Double(Math.pow(10, bit)).intValue());
while (randNum < new Double(Math.pow(10, bit - 1)).intValue()) {
    randNum = r.nextInt(new Double(Math.pow(10, bit)).intValue());
return String.valueOf(randNum);