import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Random;

public class cheshiL {

public static List<String>string=new ArrayList<String>();

public static void csl(){

Random random=new Random();

String stringa="QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm1234567890";

for(int i=0;i<10;i++){

StringBuilder sb=new StringBuilder();

int  k;

do{

 k=random.nextInt(10);

for(int w=0;w<k;w++){

sb=sb.append(stringa.charAt(random.nextInt(62)));

}

}while(k==0 ||string.contains(sb));

string.add(sb.toString());

System.out.println("成功添加整数:"+sb.toString());

}

System.out.println("----------排序前---------");

for (String string2 : string) {

System.out.println("元素:"+string2);

}

Collections.sort(string);

System.out.println("----------排序后---------");

for (String string2 : string) {

System.out.println("元素:"+string2);

}

} 

public static void main(String[] args) {

// TODO 自动生成的方法存根

cheshiL.csl();

}

}