Java代码实现：自制双色球小游戏，生成随机数不重复

游戏规则：

1-33号红球你可以选择6个球号，1-16号蓝球你可以选择1个球号，也可利用系统随机生成，然后利用系统生成红球与蓝球，在进行比较，球号相同数越多，奖励越高哦！

主要功能就是 ：随机数生成不重复。

//代码可优化
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class DichroicBall {
	Random rd = new Random();

	static int[] userRedball = new int[6];// 保存用户选择红球数
	static int userBlueball = 0;
	static int[] sysRedball = new int[6];// 保存系统选择红球数
	static int sysBlueball = 0;

	int userCorrectRedBall = 0;// 记录正确个数
	int userCorrectBlueBall = 0;

	int Deposit[] = new int[33];// 1-33

	public static void main(String[] args) {
		DichroicBall db = new DichroicBall();

		db.function();
		db.function2();
		db.compareOf(sysRedball, userRedball, userBlueball, sysBlueball);
		db.sysOutput(sysRedball);
		db.userOutput(userRedball);

	}

	public DichroicBall() {// 初始化1-33红球号

		for (int i = 0; i < Deposit.length; i++) {
			Deposit[i] = i + 1;
		}
	}

	public void sysOutput(int ball[]) {// 系统生成红球数组输出

		System.out.println("Winning the prize in this issue red Ball Number:");
		Sort(ball);
		System.out.println(Arrays.toString(ball));
		System.out.println("Winning the prize in this issue blue Ball Number:" + sysBlueball);

	}

	public void userOutput(int ball[]) {// 用户生成红球数组输出
		System.out.println("Red Ball of Your Choice:");
		Sort(ball);
		System.out.println(Arrays.toString(ball));
		System.out.println("Blue Ball of Your Choice:" + userBlueball);

	}

	public void Sort(int ball[]) {//排序算法

		for (int i = 0; i < ball.length - 1; i++) {// 冒泡排序
			for (int j = 0; j < ball.length - 1 - i; j++) {
				if (ball[j] > ball[j + 1]) {
					ball[j] = ball[j + 1] + ball[j];
					ball[j + 1] = ball[j] - ball[j + 1];
					ball[j] = ball[j] - ball[j + 1];
				}
			}
		}

	}

	public void compareOf(int[] sys, int[] user, int a, int b) {//用户球数与系统球数比较
		int len = sys.length;
		int len2 = user.length;

		for (int i = 0; i < len; i++) {
			for (int j = 0; j < len2; j++) {// 比较算法可以优化

				if (sys[i] == user[j]) {
					userCorrectRedBall++;
				}
			}
		}

		System.out.println("Number of Red Ball Winners:" + userCorrectRedBall);

		if (a == b)//蓝球比较
			userCorrectBlueBall = 1;

		System.out.println("Number of Blue Ball Winners:" + userCorrectBlueBall);

		if (userCorrectBlueBall == 0 && userCorrectRedBall < 3) {
			System.out.println("Sorry,you didn't win the prize,Please purchase the next issue.");
			
		} else if (userCorrectRedBall <= 3) {
			System.out.println("congratulation! Third Award.");
		} else if (userCorrectBlueBall == 1 && userCorrectRedBall < 6) {
			System.out.println("congratulation! Second award.");
		} else if (userCorrectBlueBall == 1 && userCorrectRedBall == 6) {
			System.out.println("congratulation! The first prize.");
		} else {
			System.out.println("System crash,no charge for this time.");
		}
	}

	public void function2() {
		// 系统随机生成红蓝球
		computerSelection(Deposit, sysRedball);
		sysBlueball = rd.nextInt(16) + 1; //1-16
	}

	public void function() {
		System.out.println("Two-color ball game begins,please choose:");
		System.out.println("1:systemselect 2:uesrselect");
		String num = JOptionPane.showInputDialog("please input 1 or 2:");
		int num2 = Integer.parseInt(num);
		while (true) {//可容错
			if (num2 == 1) {
				System.out.println("your choice is systemselect");
				computerSelection(Deposit, userRedball);// 机选红球
				userBlueball = rd.nextInt(16) + 1;// 机选蓝球
				break;

			} else if (num2 == 2) {
				System.out.println("your choice is uesrselect");
				System.out
						.println("please selection six red ball number(1-33):");
				int len = userRedball.length;
				for (int i = 0; i < len; i++) {
					userRedball[i] = new Scanner(System.in).nextInt();
				}
				System.out
						.println("please selection one blue ball number(1-16):");
				userBlueball = new Scanner(System.in).nextInt();
				break;

			} else {
				System.out.println("fatal error,please input again:");
				num = JOptionPane.showInputDialog("please input 1 or 2:");
				num2 = Integer.parseInt(num);
			}
		}
	}

	// 核心技术，随机数不重复
	public void computerSelection(int[] Redball, int[] userRedball) {
		int len = Redball.length;// 33
		int len2 = userRedball.length;// 6
		int index = -1;// 下标值

		for (int i = 0; i < len2; i++) {// 循环6次

			index = rd.nextInt(len - i);// 每次减去最后一个，防止随机重复: 1-33 1-32 1-31
			userRedball[i] = Redball[index];// 先保存在6个红球中，然后将这个球与最后交换位置即可

			int temp = Redball[index];// temp保存要移动的数
			Redball[index] = Redball[len - 1 - i];// 生成数与（1-33）最后一个交换位置，防止随机重复
			Redball[len - 1 - i] = temp;//完成交换
			// 完成后数组 Deposit被打乱
		}
	}
}