利用Java程序统计彩票双色球中一等奖究竟有多难-白红宇的个人博客

发布日期：2021-06-30 16:22:57 浏览次数：4 分类：技术文章

本文共 10115 字，大约阅读时间需要 33 分钟。

上周日路过彩票店，买了注彩票（随机打的），试试手气看能不能中奖顺便为了福利做贡献

嗯，结果很现实，没中~~~ 当然是在我的预料之中

心想着买了这么多次，哪怕中个蓝色球呢，不止于这么惨吧，干脆自己写个程序分析下一等奖的中奖究竟有多难

说干就干10分钟后程序写出来了，但执行的时候，醉了0.0 TM实在是等不及了

package com.data.cp;import java.util.ArrayList;import java.util.Collections;import java.util.List;import java.util.Random;public class CpTest {	public static void main(String[] args) {		// 2020-105期  本期销售 399513718    两元一注则共199756859注彩票		int cpNum = 199756859;		String cpOneStr = "06-14-19-20-22-24-01"; //getCpStr(); //随机一注		Long startTime = System.currentTimeMillis();		//for循环		int cpOneNum = getCpOneNumFunc1(cpOneStr,cpNum);		System.out.println("中奖号码" + cpOneStr + " , 模拟"+ cpNum + "注彩票中预计一等奖数量 ：" + cpOneNum);		Long endTime = System.currentTimeMillis();		System.out.println("用时：" + (endTime - startTime + "毫秒")); 	}	private static int getCpOneNumFunc1(String cpOneStr, int cpNum) {		int cpOneNum = 0;		String cpTempStr = "";		for (int i=1; i<=cpNum; i++) {			cpTempStr = getCpStr();			if(cpTempStr.equals(cpOneStr)) {				cpOneNum++;			}		}		return cpOneNum;	}		private static String getCpStr() {				List
   
     redList = new ArrayList
    
     ();		for (int i=1; i<=33; i++) {			redList.add(i);		}				List
     
       blueList = new ArrayList
      
       ();		for (int i=1; i<=16; i++) {			blueList.add(i);		}				Random rand = new Random();		List
       
         tempList = new ArrayList
        
         (); for (int i=1; i<=6; i++) { int randRed = rand.nextInt(redList.size()); tempList.add(redList.get(randRed)); redList.remove(randRed); } Collections.sort(tempList); int randBlue = rand.nextInt(blueList.size()); tempList.add(blueList.get(randBlue)); StringBuffer sb = new StringBuffer(); int spl = 0; for (Integer integer : tempList) { String numStr = integer.toString(); if(integer < 10) { numStr = "0" + numStr; } if(spl < 6) { numStr += "-"; } sb.append(numStr); spl++; } //System.out.println(sb.toString()); return sb.toString(); } }

10分钟没执行完，我是不想等了...程序执行的时间超出了我写程序的时间果断要优化，于是加入了多线程

package com.data.cp;import java.util.ArrayList;import java.util.Collections;import java.util.List;import java.util.Random;import java.util.concurrent.CopyOnWriteArrayList;import java.util.concurrent.CountDownLatch;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;public class CpTest {	public static void main(String[] args) {		// 2020-105期  本期销售 399513718    两元一注则共199756859注彩票		int cpNum = 199756859;		String cpOneStr = "06-14-19-20-22-24-01"; //getCpStr(); //随机一注		Long startTime = System.currentTimeMillis();		//for循环		//int cpOneNum = getCpOneNumFunc1(cpOneStr,cpNum);// 10分钟没执行完 ，我是不想等了...		//多线程处理 		int cpOneNum = getCpOneNumFunc2(cpOneStr,cpNum);//多线程处理  60s左右 		System.out.println("中奖号码" + cpOneStr + " , 模拟"+ cpNum + "注彩票中预计一等奖数量 ：" + cpOneNum);		Long endTime = System.currentTimeMillis();		System.out.println("用时：" + (endTime - startTime + "毫秒")); 	}	private static int getCpOneNumFunc1(String cpOneStr, int cpNum) {		int cpOneNum = 0;		String cpTempStr = "";		for (int i=1; i<=cpNum; i++) {			cpTempStr = getCpStr();			if(cpTempStr.equals(cpOneStr)) {				cpOneNum++;			}		}		return cpOneNum;	}		private static int getCpOneNumFunc2(String cpOneStr, int cpNum) {		int cpOneNum = 0;		int countDownLatchNum = 1000;//线程数		List
   
     digits = digits(cpNum,countDownLatchNum);		List
    
      list = new CopyOnWriteArrayList
     
      ();//存放返回结果		CountDownLatch countDownLatch = new CountDownLatch(countDownLatchNum);		ExecutorService executorService = Executors.newFixedThreadPool(countDownLatchNum);		for (int i = 0; i < countDownLatchNum; i++) {			Runnable runnable = new Runnable(){				@Override				public void run() {					 try {						String name = Thread.currentThread().getName();						String[] split = name.split("-");						Integer threadId = Integer.parseInt(split[split.length-1]) - 1;						Integer taskNum = digits.get(threadId);						System.out.println("线程name:" + name + " \t执行任务数量：" + taskNum);						int cpOneNumRunnable = getCpOneNumFunc1(cpOneStr,taskNum);						//System.out.println("线程name:" + name + " \t执行完毕结果：" + cpOneNumRunnable);                        list.add(cpOneNumRunnable);                        countDownLatch.countDown();					} catch (Exception e) {						e.printStackTrace();					}				}			};			executorService.execute(runnable);		}		try {			countDownLatch.await();		} catch (InterruptedException e) {			e.printStackTrace();		}		executorService.shutdown();		for (Integer result : list) {			cpOneNum += result;		}		return cpOneNum;	}		private static List
      
        digits(int cpNum, int countDownLatchNum) {		List
       
         digitNums = new CopyOnWriteArrayList
        
         (); if(cpNum % countDownLatchNum > 0) { countDownLatchNum = countDownLatchNum-1; } int spl = cpNum / countDownLatchNum; for (int i = 0; i < countDownLatchNum; i++) { digitNums.add(spl); } if(cpNum % countDownLatchNum > 0) { digitNums.add(cpNum % countDownLatchNum); } return digitNums; } private static String getCpStr() { List
         
           redList = new ArrayList
          
           (); for (int i=1; i<=33; i++) { redList.add(i); } List
           
             blueList = new ArrayList
            
             (); for (int i=1; i<=16; i++) { blueList.add(i); } Random rand = new Random(); List
             
               tempList = new ArrayList
              
               (); for (int i=1; i<=6; i++) { int randRed = rand.nextInt(redList.size()); tempList.add(redList.get(randRed)); redList.remove(randRed); } Collections.sort(tempList); int randBlue = rand.nextInt(blueList.size()); tempList.add(blueList.get(randBlue)); StringBuffer sb = new StringBuffer(); int spl = 0; for (Integer integer : tempList) { String numStr = integer.toString(); if(integer < 10) { numStr = "0" + numStr; } if(spl < 6) { numStr += "-"; } sb.append(numStr); spl++; } //System.out.println(sb.toString()); return sb.toString(); } }

效果貌似不错，不到1分钟就出结果了

嗯多试几次

艾玛福彩诚不欺我一等奖数量确实概率小的可怜，我这还是全部随机的单注，想想有些人几倍的投，这个概率确实正常

再来算一下双色球有多少种排列组合

双色球的排列组合一共 17721088 种，大奖虽好、还是放弃幻想，拥抱现实吧~~

顺便再来分析下体彩大乐透，它的规则是这样的

第六条 超级大乐透基本投注是指从前区号码中任选5个号码，并从后区号码中任选2个号码的组合进行投注。其中，前区号码由01—35共35个号码组成，后区号码由01—12共12个号码组成。每注基本投注金额人民币2元。购买者在基本投注的基础上，可对购买的每注号码进行一次追加投注，每注追加投注金额人民币1元。

它的玩法与双色球有相似的地方都是7个号码，只不过是5红2蓝构成，同时红色是1-35，蓝色1-12乍一看感觉比双色球概率大一些，一算就明白了，他的排列组合数为21425712，竟然比双色球都多！写个程序分析下

package com.data.cp;import java.util.ArrayList;import java.util.Collections;import java.util.List;import java.util.Random;import java.util.concurrent.CopyOnWriteArrayList;import java.util.concurrent.CountDownLatch;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;public class CpBigLottoTest {		public static void main(String[] args) {		// 2020-107期  本期销售:￥282,777,346元    两元一注则共141388673注彩票		int cpNum = 141388673;		String cpOneStr = "01-04-13-17-28-03-07"; //getCpStr(); //随机一注		Long startTime = System.currentTimeMillis();		//多线程处理 		int cpOneNum = getCpOneNumFunc1(cpOneStr,cpNum);//多线程处理  60s左右 		System.out.println("中奖号码" + cpOneStr + " , 模拟"+ cpNum + "注彩票中预计一等奖数量 ：" + cpOneNum);		Long endTime = System.currentTimeMillis();		System.out.println("用时：" + (endTime - startTime + "毫秒")); 	}		private static int getCpOneNumFunc1(String cpOneStr, int cpNum) {		int cpOneNum = 0;		int countDownLatchNum = 1000;//线程数		List
   
     digits = digits(cpNum,countDownLatchNum);		List
    
      list = new CopyOnWriteArrayList
     
      ();//存放返回结果		CountDownLatch countDownLatch = new CountDownLatch(countDownLatchNum);		ExecutorService executorService = Executors.newFixedThreadPool(countDownLatchNum);		for (int i = 0; i < countDownLatchNum; i++) {			Runnable runnable = new Runnable(){								@Override				public void run() {					 try {						String name = Thread.currentThread().getName();						String[] split = name.split("-");						Integer threadId = Integer.parseInt(split[split.length-1]) - 1;						Integer taskNum = digits.get(threadId);						System.out.println("线程name:" + name + " \t执行任务数量：" + taskNum);						int cpOneNumRunnable = getCpOneNumFunc(cpOneStr,taskNum);						//System.out.println("线程name:" + name + " \t执行完毕结果：" + cpOneNumRunnable);                        list.add(cpOneNumRunnable);                        countDownLatch.countDown();					} catch (Exception e) {						e.printStackTrace();					}				}								private int getCpOneNumFunc(String cpOneStr, int cpNum) {					int cpOneNum = 0;					String cpTempStr = "";					for (int i=1; i<=cpNum; i++) {						cpTempStr = getCpStr();						if(cpTempStr.equals(cpOneStr)) {							cpOneNum++;						}					}					return cpOneNum;				}							};			executorService.execute(runnable);		}		try {			countDownLatch.await();		} catch (InterruptedException e) {			e.printStackTrace();		}		executorService.shutdown();		for (Integer result : list) {			cpOneNum += result;		}		return cpOneNum;	}		private static List
      
        digits(int cpNum, int countDownLatchNum) {		List
       
         digitNums = new CopyOnWriteArrayList
        
         (); if(cpNum % countDownLatchNum > 0) { countDownLatchNum = countDownLatchNum-1; } int spl = cpNum / countDownLatchNum; for (int i = 0; i < countDownLatchNum; i++) { digitNums.add(spl); } if(cpNum % countDownLatchNum > 0) { digitNums.add(cpNum % countDownLatchNum); } return digitNums; } private static String getCpStr() { List
         
           redList = new ArrayList
          
           (); for (int i=1; i<=35; i++) { redList.add(i); } List
           
             blueList = new ArrayList
            
             (); for (int i=1; i<=12; i++) { blueList.add(i); } Random rand = new Random(); List
             
               tempRedList = new ArrayList
              
               (); for (int i=1; i<=5; i++) { int randRed = rand.nextInt(redList.size()); tempRedList.add(redList.get(randRed)); redList.remove(randRed); } Collections.sort(tempRedList); List
               
                 tempBlueList = new ArrayList
                
                 (); for (int i=1; i<=2; i++) { int randBlue = rand.nextInt(blueList.size()); tempBlueList.add(blueList.get(randBlue)); blueList.remove(randBlue); } Collections.sort(tempBlueList); for (Integer blueNum : tempBlueList) { tempRedList.add(blueNum); } StringBuffer sb = new StringBuffer(); int spl = 0; for (Integer num : tempRedList) { String numStr = num.toString(); if(num < 10) { numStr = "0" + numStr; } if(spl < 6) { numStr += "-"; } sb.append(numStr); spl++; } //System.out.println(sb.toString()); return sb.toString(); }}