有兄弟帮忙看看这代码为啥不a吗 import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String str = sc.next(); int n = str.length(); char[] s = str.toCharArray(); int[] minL = new int[n]; minL[n - 1] = n - 1; for (int i = n - 2; i >= 0; --i) { minL[i] = s[minL[i + 1]] < s[i] ? minL[i + 1] : i; } for (int j = 0; j < n - 1; j++) { if (s[j] > s[minL[j + 1]]) { swap(s, j, minL[j + 1]); System.out.println(s); return; } } System.out.println(str); } private static void swap(char[] s, int a, int b) { char tmp = s[a]; s[a] = s[b]; s[b] = tmp; } }