通过Java实现双色球原理

红太狼 2024-03-31 14:47 71阅读 0赞

**1** **问题**

双色球投注区分为红色球号码区和蓝色球号码区，红色球号码区由1-33共三十三个号码组成，蓝色球号码区由1-16共十六个号码组成。投注时选择6个红色球号码和1个蓝色球号码组成一注进行单式投注。那如何用Java来实现双色球呢？

**2** **方法**

1.  引入random实现随机数生成。
2.  建一个7位的数组来保存双色球号码。
3.  通过random的范围设定，满足前6位的范围是1-33，第七位范围是1-16.
4.  判断双色球号码中是否有重复的数字，如果有就重新随机一组数字。

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 <td>import java.util.Random; public class Lottery { &nbsp; &nbsp;public static void main(String[] args) { &nbsp; &nbsp; &nbsp; &nbsp;int[] arr = createNumber(); &nbsp; &nbsp; &nbsp; &nbsp;for (int i = 0; i &lt; arr.length; i++) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;System.out.print(arr[i] + " "); &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp;} &nbsp; &nbsp;public static int [] createNumber() { &nbsp; &nbsp; &nbsp; &nbsp;int [] arr = new int[7]; &nbsp; &nbsp; &nbsp; &nbsp;Random r = new Random(); &nbsp; &nbsp; &nbsp; &nbsp;for (int i = 0; i &lt; 6;) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;int redNumber = r.nextInt(33)+1; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;boolean flag = contains(arr,redNumber); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if(!flag){ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;arr[i] = redNumber; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;i++; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp; &nbsp; &nbsp;int blueNumber = r.nextInt (16) +1; &nbsp; &nbsp; &nbsp; &nbsp;arr[arr.length - 1] = blueNumber; &nbsp; &nbsp; &nbsp; &nbsp;return arr; &nbsp; &nbsp;} &nbsp; &nbsp;public static boolean contains(int[] arr,int number) { &nbsp; &nbsp; &nbsp; &nbsp;for (int i = 0; i &lt; arr.length; i++) { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;if(arr[i] == number){ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;return true; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp; &nbsp; &nbsp;} &nbsp; &nbsp; &nbsp; &nbsp;return false; &nbsp; &nbsp;} }</td> 
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**3** **结语**

生活中的很多事情的逻辑都可以用Java来实现，双色球也不例外。在该段代码中的Java方法，可以使Java的程序可以独立且更加简洁，可提供重复使用，是Java学习中非常重要的一部分。