Java Utililty Methods Integer Array to String

if (numbers == null) {
    return null;
final String[] strings = new String[numbers.length];
int index = 0;
for (final int number : numbers) {
    strings[index++] = Integer.toString(number);
return strings;

String[] stringreps = new String[intreps.length];
for (int i = 0; i < intreps.length; i++)
    stringreps[i] = new Integer(intreps[i]).toString();
return stringreps;

String string = "";
for (int val : array) {
    string += val + " ";
string.trim();
return string;