随机打乱字符串

import java.util.Random;
import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        Random r=new Random();
        int a=r.nextInt(A.length());
        System.out.println(method(A,a));

    }
    public  static String remove(String s){
        StringBuilder sb=new StringBuilder();
        char c=s.charAt(0);
        for (int i = 1; i < s.length(); i++) {
            sb.append(s.charAt(i));
        }
        sb.append(c);
        return sb.toString();
    }
    public static String method(String A,int a){

        for (int i = 0; i < a; i++) {
            A=remove(A);
        }
        return A;
    }
}