第六章 生成隨機字串並排序 練習

package com.imooc;

import java.util.ArrayList;
import java.util.Collections;

import java.util.List;
import java.util.Random;

public class TestRandom {
public static List randomstring=new ArrayList();
public static void testRandomString(){
Random random=new Random();
String str="QWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm1234567890";
for(int i=0;i StringBuilder sb=new StringBuilder();
int length;
do{
length=random.nextInt(11);

            for(int j=0;j

}