题解 | #图片整理#

import java.util.Scanner;

import java.util.Arrays;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
       Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        char[] chars = str.toCharArray();
        Arrays.sort(chars);
        for (int i = 0; i < chars.length; i++) {
            System.out.print(chars[i]);
        }
        scanner.close();
    }
}