Interview question asked in ServiceNow interview to person

Question : Concatenate the number 9, 90,900, 110,11,45 in a way that you will get the highest number out of it. (9909004511110)
Code : Below is the code for that. I have not tested it properly but should work, if it fails for any case please let me know -
import java.util.Arrays;
import java.util.Comparator;
public class ServiceNow2 implements Comparator<String>{
 
// public static Integer[] nums = {9,90,900,45,110,11};
 public static Integer[] nums = {8, 100, 22, 101, 77};
 
 public static void main(String[] args) {
  String[] sorted = new String[nums.length];
  int i = 0;
  for(int num : nums) {
   String str = Integer.toString(num);
   sorted[i] = str;
   i++;
  }
  Arrays.sort(sorted);
  Arrays.sort(sorted, new ServiceNow2());
  String result = "";
  for(String str : sorted) {
   result = result + str;
  }
  System.out.println(result);
 }
 @Override
 public int compare(String cur, String o) {
  String curr = cur.toString();
  String next = o;
  int i = 0;
  int j = 0;
  while(i <= curr.length()-1 && j <= next.length()-1) {
   if(curr.charAt(i) > next.charAt(j)) {
    return -1;
   } else if(curr.charAt(i) < next.charAt(j)) {
    return 1;
   }
   i++;
   j++;
  }
  if(curr.length() > next.length()) {
   return 1;
  }
  return 0;
 }
}​