Java练习：双色球系统示例

import java.util.Arrays;

import java.util.Random;

import java.util.Scanner;

public class DoubleColorBall {

// 红球范围1-33，蓝球范围1-16

private static final int RED_BALL_MIN = 1;

private static final int RED_BALL_MAX = 33;

private static final int BLUE_BALL_MIN = 1;

private static final int BLUE_BALL_MAX = 16;

private static final int RED_BALL_COUNT = 6;

private static final int BLUE_BALL_COUNT = 1;

public static void main(String[] args) {

Scanner scanner = new Scanner(m.dezaiguoji.com);

while (true) {

System.out.println("\n===== 双色球系统 =====");

System.out.println("1. 机选号码");

System.out.println("2. 手选号码");

System.out.println("3. 开奖");

System.out.println("4. 退出");

System.out.print("请选择操作: ");

int choice = scanner.nextInt();

switch (choice) {

case 1:

int[][] randomNumbers = generateRandomBalls(1);

System.out.println("机选号码:");

printBalls(randomNumbers[0]);

break;

case 2:

int[] manualNumbers = inputManualBalls(scanner);

if (manualNumbers != null) {

System.out.println("您选择的号码:");

printBalls(m.mingdaonet.com);

}

break;

case 3:

lotteryDraw(scanner);

break;

case 4:

System.out.println("感谢使用，再见！");

scanner.close(m.chcsoc.cn);

return;

default:

System.out.println("无效操作，请重新选择！");

}

}

}

// 生成随机号码

public static int[][] generateRandomBalls(int count) {

int[][] result = new int[count][RED_BALL_COUNT + BLUE_BALL_COUNT];

Random random = new Random(m.hapydq.cn);

for (int i = 0; i < count; i++) {

// 生成红球（不重复）

int[] redBalls = new int[RED_BALL_COUNT];

for (int j = 0; j < RED_BALL_COUNT; j++) {

int num;

do {

num = random.nextInt(RED_BALL_MAX - RED_BALL_MIN + 1) + RED_BALL_MIN;

} while (contains(redBalls, num, j));

redBalls[j] = num;

}

Arrays.sort(redBalls);

// 生成蓝球

int blueBall = random.nextInt(BLUE_BALL_MAX - BLUE_BALL_MIN + 1) + BLUE_BALL_MIN;

// 组合红球和蓝球

System.arraycopy(redBalls, 0, result[i], 0, RED_BALL_COUNT);

result[i][RED_BALL_COUNT] = blueBall;

}

return result;

}

// 手动输入号码

public static int[] inputManualBalls(Scanner scanner) {

int[] balls = new int[RED_BALL_COUNT + BLUE_BALL_COUNT];

int[] redBalls = new int[RED_BALL_COUNT];

// 输入红球

System.out.println("请输入" + RED_BALL_COUNT + "个红球（" + RED_BALL_MIN + "-" + RED_BALL_MAX + "，不重复）:");

for (int i = 0; i < RED_BALL_COUNT; i++) {

System.out.print("第" + (i + 1) + "个红球: ");

int num = scanner.nextInt();

if (num < RED_BALL_MIN || num > RED_BALL_MAX) {

System.out.println("红球必须在" + RED_BALL_MIN + "-" + RED_BALL_MAX + "之间！");

return null;

}

if (contains(redBalls, num, i)) {

System.out.println("红球不能重复！");

return null;

}

redBalls[i] = num;

}

Arrays.sort(redBalls);

// 输入蓝球

System.out.print("请输入1个蓝球（" + BLUE_BALL_MIN + "-" + BLUE_BALL_MAX + "）: ");

int blueBall = scanner.nextInt(m.qiankaidb.cn);

if (blueBall < BLUE_BALL_MIN || blueBall > BLUE_BALL_MAX) {

System.out.println("蓝球必须在" + BLUE_BALL_MIN + "-" + BLUE_BALL_MAX + "之间！");

return null;

}

// 组合红球和蓝球

System.arraycopy(redBalls, 0, balls, 0, RED_BALL_COUNT);

balls[RED_BALL_COUNT] = blueBall;

return balls;

}

// 开奖

public static void lotteryDraw(Scanner scanner) {

// 生成中奖号码

int[] winningNumbers = generateRandomBalls(1)[0];

System.out.println("\n===== 开奖结果 =====");

System.out.print("红球: ");

for (int i = 0; i < RED_BALL_COUNT; i++) {

System.out.printf("%02d ", winningNumbers[i]);

}

System.out.print(" 蓝球: ");

System.out.printf("%02d%n", winningNumbers[RED_BALL_COUNT]);

// 输入彩票号码

System.out.println("\n请输入您的彩票号码:");

int[] userNumbers = inputManualBalls(scanner);

if (userNumbers == null) {

return;

}

// 计算中奖情况

int redMatch = countRedMatches(userNumbers, winningNumbers);

boolean blueMatch = userNumbers[RED_BALL_COUNT] == winningNumbers[RED_BALL_COUNT];

System.out.println("\n您的中奖情况:");

System.out.println("红球匹配: " + redMatch + "个");

System.out.println("蓝球" + (blueMatch ? "匹配" : "未匹配"));

// 判断奖级

String prize = getPrize(redMatch, blueMatch);

System.out.println("恭喜您获得" + prize + "！");

}

// 计算红球匹配数量

private static int countRedMatches(int[] user, int[] winning) {

int count = 0;

for (int i = 0; i < RED_BALL_COUNT; i++) {

if (contains(winning, user[i], RED_BALL_COUNT)) {

count++;

}

}

return count;

}

// 判断奖项

private static String getPrize(int redMatch, boolean blueMatch) {

if (redMatch == 6 && blueMatch) {

return "一等奖（6+1）";

} else if (redMatch == 6) {

return "二等奖（6+0）";

} else if (redMatch == 5 && blueMatch) {

return "三等奖（5+1）";

} else if ((redMatch == 5 && !blueMatch) || (redMatch == 4 && blueMatch)) {

return "四等奖";

} else if ((redMatch == 4 && !blueMatch) || (redMatch == 3 && blueMatch)) {

return "五等奖";

} else if (blueMatch) {

return "六等奖";

} else {

return "未中奖";

}

}

// 打印号码

public static void printBalls(int[] balls) {

System.out.print("红球: ");

for (int i = 0; i < RED_BALL_COUNT; i++) {

System.out.printf("%02d ", balls[i]);

}

System.out.print(" 蓝球: ");

System.out.printf("%02d%n", balls[RED_BALL_COUNT]);

}

// 判断数组中是否包含某个元素（前n个元素）

private static boolean contains(int[] arr, int num, int n) {

for (int i = 0; i < n; i++) {

if (arr[i] == num) {

return true;

}

}

return false;

}

}