双色球代码

package org.tarena.day05; 
import java.util.Arrays; 
import java.util.Random;   
public class Double {    
public static void main(String[] args) {   
// TODO Auto-generated method stub   
String balls[] =  {"01","02","03","04","05","06","07","08","09",      "10","11","12","13","14","15","16","17","18","19","20",      "21","22","23","24","25","26","27","28","29","30","31","32","33"};    //定义一个boolean类型数组b，其中全部的balls.length个元素都默认是false    
boolean[] b = new boolean[balls.length];   
String [] redBalls = new String[6];   
Random r = new Random();   
int i = 0;   
while(true){     
//nextInt(n)它是生成一个随机的int值，范围是从0（包括）和n（不包括）之间。     
int index = r.nextInt(balls.length);    
if(b[index]){     continue;    }     redBalls[i++] = balls[index];    b[index] = true;     //检查redballs数组是否存满,     
if(i == redBalls.length) break;   }    //红球数组排序    Arrays.sort(redBalls);   //红球数组扩容后形成新数组   
String[]  allBalls=Arrays.copyOf(redBalls,redBalls.length+1);   
//随机抽取"0"-"16"号码的球放在新数组的最后一个位置   allBalls[allBalls.length-1]=balls[r.nextInt(16)];   System.out.println(Arrays.toString(allBalls));     }