package collection;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import java.util.Random;

import java.util.UUID;

public class collectionTest {

    public void testSort3() {

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

        Random random = new Random();

        String randomStr;

        for(int i=0;i<10;i++) {

            int R = random.nextInt(10);

            do {

                randomStr = UUID.randomUUID().toString().substring(0, R);

             }while(stList.contains(randomStr));

            stList.add(randomStr);

            System.out.println("将要添加字符串:"+randomStr);

        }

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

        for(String s:stList) {

            System.out.println("元素:"+s);

        }

        Collections.sort(stList);

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

        for(String s:stList) {

            System.out.println("元素:"+s);

        }

}

public static void main(String[] args) {

// TODO Auto-generated method stub

collectionTest ct = new collectionTest();

// ct.testSort1();

// ct.testSort2(); 

ct.testSort3();

}