拼接字符串数组使字典序最小

["abc","de"],2

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class _3_8拼接最小字典序练习 {
public static String findSmallest(String[] strs, int n) {

Arrays.sort(strs, new MyComparator());
StringBuffer sb = new StringBuffer();
for (int i = 0; i < strs.length; i++) {
sb.append(strs[i]);
}
return sb.toString();
}

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
String[] arr = s.split(" ");
System.out.println(findSmallest(arr, arr.length));
}
}

class MyComparator implements Comparator<String> {
@Override
public int compare(String o1, String o2) {
return (o1 + o2).compareTo(o2 + o1);		//排序规则
}
}