Java Utililty Methods Random Number

Random rm = new Random();
int pross = (int) (rm.nextDouble() * Math.pow(10, length));
return String.format("%0" + length + "d", pross);

String result = "";
for (int i = 0; i < length; i++) {
    Random rm = new Random();
    result += words[rm.nextInt(60)];
return result;

return getNumber(2);

Random r = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < 4; i++) {
    sb.append(getRandomChar(r.nextInt(1)));
return String.valueOf(sb);

int number = _nX0 + (Math.abs(random.nextInt()) % (_nX1 - _nX0)) * 3 / 5;
return number > 170 ? 170 : number;

Random r = new Random();
String n = "0123456789";
String code = "";
for (int i = 0; i < length; i++) {
    code += n.charAt(r.nextInt(n.length()));
return code;

StringBuilder sb = new StringBuilder(length);
while (length-- > 0) {
    sb.append(randomChar(NUMBERS));
return sb.toString();

String sRand = "";
for (int i = 0; i < length; i++) {
    String rand = String.valueOf(random.nextInt(10));
    sRand += rand;
return sRand;

if (seed == 0) {
    return 0;
return getNumber() % seed;

if (seed == 0) {
    return 0;
return getNumber() % (seed + 1);