随机字符串

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Random;

public class aa {

public String sourse="qwertyuiopasdfghjklzxcvbnmQWERTYUIOPLKJHGFDSAZXCVBNM0123456789";

public void testSort2(){

List<String> stringList = new ArrayList<String>();

Random random = new Random();

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

String str="";

do{

str= "";

int a=random.nextInt(9)+1;

for(int j=0;j<a;j++){

char cr=sourse.charAt(random.nextInt(sourse.length()-1));

                   str+=cr;}

}while (stringList.contains(str));

stringList.add(str);

System.out.println("成功添加字符串："+str);}

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

for(String string:stringList){

System.out.println("："+string);

}

Collections.sort(stringList);

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

for(String string:stringList){

System.out.println("元素："+string);

}

}

public static void main(String[] args) {

// TODO 自动生成的方法存根

aa c= new aa();

c.testSort2();

}

}