初学java之双色球

使用到的部分知识总结：1.创建扫描器的类及使用 2.随机数生成 3.数组冒泡排序及数组的遍历方式
//代码如下
package com.guigu.example;import java.util.Random;
import java.util.Scanner;/*** @author HaiOU* @name ShuangSeQiu* @create 2022-07-08 8:37*/
public class ShuangSeQiu {public static void main(String[] args) {//输出提示消息System.out.println("欢迎购买中国福利彩票：双色球");System.out.println("请选择选号方式：1、自选 2、机选：");//接收用户输入//需要创建一个扫描器的类Scanner sc = new Scanner(System.in);//获取用户的输入的数据，并保存到整数变量中int choose = sc.nextInt();//System.out.println("choose = " + choose);//定义一个数组，来保存号码int[] balls = new int[7];if(choose == 1){//自选//提示用户输入6个红球
//            System.out.println("请输入第一个红球号码：");
//            balls[0] = sc.nextInt();
//            System.out.println("请输入第二个红球号码：");
//            balls[1] = sc.nextInt();//以上代码重复出现，应该使用循环结构for(int i=0 ; i<6 ; i++ ){System.out.println("请输入第"+(i+1)+"个红球号码：");balls[i] = sc.nextInt();}System.out.println("请输入蓝球号码：");balls[6] = sc.nextInt();}else{//调用随机号码的方法balls = getNumbers();}System.out.println("您购买的彩票号码为：");sort(balls);//排序show(balls);//输出//产生一注开奖的号码int[] luckNum = getNumbers();//int[] luckNum = {11,12,13,14,15,16,20};System.out.println("\n今日开奖号码：");sort(luckNum);show(luckNum);//判断是否中奖int level = getLevel(balls,luckNum);System.out.println("您的彩票中了"+level+"等奖");}//定义方法输出数组的值public static void show(int[] balls){System.out.print("[");for(int i=0;i<balls.length;i++){if(i==balls.length-2){System.out.print(balls[i]+" + ");}else if(i==balls.length-1){System.out.print(balls[i]);}else {System.out.print(balls[i] + "、");}}System.out.print("]");}//产生随机号码，如果随机红球，bound为33，随机蓝球bound为16public static int getNumber(int bound){Random random = new Random();return random.nextInt(bound) + 1;}//判断随机数是否已存在于数组中，存在返回true，不存在返回falsepublic static boolean isExist(int num,int[] balls,int index){for(int i=0;i<index;i++){if(num == balls[i]){return true;}}return false;}//对号码进行排序public static void sort(int[] balls){//冒泡排序使用二重循环for(int i=0;i<balls.length-1;i++){for(int j=0;j<balls.length-1-i-1;j++){if(balls[j]>balls[j+1]){int temp = balls[j];balls[j] = balls[j+1];balls[j+1] = temp;}}}}//获取随机的一组号码public static int[] getNumbers(){int[] balls = new int[7];//机选，循环调用获取随机数的方法即可，循环获取随机红球号码for(int i=0;i<6;i++){while(true) {int redBall = getNumber(33);//判断该号码是否已经存在于数组中if(isExist(redBall,balls,i)){continue;}else{balls[i] = redBall;break;}}}balls[6] = getNumber(16);//获取随机蓝球号码return balls;}//比对中奖号码public static int getLevel(int[] balls,int[] luckNum){int red = 0;int blue = 0;for(int i=0;i<balls.length-1;i++){if(balls[i] == luckNum[i]){red ++ ;}}if(balls[balls.length-1] == luckNum[luckNum.length-1]){blue ++;}//根据中奖规则，返回中了几等奖if(red==6 && blue==1){return 1;}else if(red==6 && blue==0){return 2;}else if(red==5 && blue==1){return 3;}else if((red==5&&blue==0)||(red==4&&blue==1)){return 4;}else if((red==4&&blue==0)||(red==3&&blue==1)){return 5;}else if(blue==1){return 6;}else{return 0;}}
}

//对一个数字的视为不中，手动输入没有弄不允许重复数字