剑指 Offer 45. 把数组排成最小的数 - 模拟排序

class Solution {
    public String minNumber(int[] nums) {
                    if(nums==null||nums.length==0){
                return "";
            }
            int len=nums.length;
            String []s=new String[len];
            for(int i=0;i<len;i++){
                s[i]=String.valueOf(nums[i]);
            }
            Arrays.sort(s,new Comparator<String>(){
                @Override
                public int compare(String o1, String o2) {
                    return (o1+o2).compareTo(o2+o1);
                }    
            });
            String result="";
            for(int i=0;i<len;i++){
                result=result+s[i];
            }
            return result;

    }
}