Java好是好,就是得多背一些方法才行。加油
import java.util.Scanner; import java.util.Arrays; public class Main { public static void main(String args[]){ Scanner input = new Scanner(System.in); while(input.hasNext()){ String str = input.next(); char[] s = str.toCharArray(); Arrays.sort(s); System.out.println(s[0] + " " + s[1] + " " + s[2]); } } }