java简单的双色球摇号程序

 import java.util.HashSet;
 import java.util.Random;
 import java.util.Set;

 /**
  * LotteryClient
  * @author hm.zhou
  *
  */
 public class LotteryClient {

     public static void main(String[] args) {
         doStart(10);
     }

     //随机产生几组号码
     private static void doStart(int times){
         for (int i = 0; i < times; i++) {
             productNum();
         }

     }
     //随机摇出一个号
     private static void productNum(){
         Set<String> redNums = new HashSet<String>();
         //产生红球
         while(redNums.size()<6){
             redNums.add(getNum(34));
         }
         for(String redNum:redNums){
             System.out.print(redNum+" ");
         }
         System.out.print("+ ");
         //产生蓝球
         System.out.print(getNum(17) + "\n");

     }
     //随机产生数
     public static String getNum(int maxNum){
         Random random = new Random();
         int blueNum = random.nextInt(maxNum);//随机产生一个整数
         if(blueNum==0)
             return getNum(maxNum);//去除0
         if(blueNum<10)
             return "0" +blueNum;
         return String.valueOf(blueNum);

     }

 }