public class Solution {
    public String PrintMinNumber(int[] numbers) {
        if(numbers==null||numbers.length==0)
            return "";
        String num[] = new String[numbers.length];
        for (int i = 0; i < num.length; i++) {
            num[i]=String.valueOf(numbers[i]);
        }
        Arrays.sort(num,(o1,o2)->{
            String t1 = o1 + o2;
            String t2 = o2 + o1;
            return t1.compareTo(t2);
        });
        StringBuilder res=new StringBuilder();
        for (String s : num) {
            res.append(s);
        }
        return res.toString();
    }
}