Java入门第三季利用Collections排序

package com.imooc.collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class testSort3 {

    List<String> stringList;

    public testSort3(){
        this.stringList = new ArrayList<String>();
    }

    public void sort(){
        String randomStr = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
        Random random = new Random();
        for(int i=0;i<10;i++){
            StringBuilder strbld = new StringBuilder(); 
            int ranLen = random.nextInt(10)+1;
            for(int j=0;j<ranLen;j++){
                char temp = randomStr.charAt(random.nextInt(randomStr.length()));
                strbld.append(temp);
            }
            stringList.add(strbld.toString());
        }
        System.out.println("-------排序前--------");
        this.show();
        Collections.sort(stringList);
        System.out.println("-------排序后--------");
        this.show();
    }

    public void show(){
        for(String str:this.stringList){
            System.out.println(str);
        }
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        testSort3 ts3 = new testSort3();
        ts3.sort();
    }

}

}