Java 实现双色球的彩票功能。规则：从33个红球中随机选择不重复的6个数，从16个蓝球中随机选择1个组成一注彩票。可以选择买多注。

package cn.zhang;

import java.util.Scanner;

public class Subject001 {
	/*
	 * 实现双色球的彩票功能。规则：从33个红球中随机选择不重复的6个数，从16个蓝球中随机选择1个组成一注彩票。可以选择买多注。
	 */
	public static void main(String[] args) {
		//创建Scanner类对象，用来获取从键盘输入的数据
		Scanner sc = new Scanner(System.in);		
		System.out.println("输入你要购买的彩票注数：");
		int num = sc.nextInt();

		for (int i = 1; i <= num; i++) {
			//随机获取一个[num1,num2)之间的int类型的数(num2>num1)：(int)(Math.random()*(num2-num1)+num1);			
			// 输出蓝球,蓝球只需要一个[1,17)
			int blueBall = (int) (Math.random() * 16 + 1);
			// 输出红球,红球需要6个[1,34)
			int redBall1 = (int) (Math.random() * 33 + 1);
			int redBall2 = 0;
			int redBall3 = 0;
			int redBall4 = 0;
			int redBall5 = 0;
			int redBall6 = 0;
			while (true) {
				int redBall = (int) (Math.random() * 33) + 1;
				if (redBall6 != 0) {// redBall6不等于0说明redBall6已经获得值了
					break;// redBall6获得值了就退出循环
				}
				if (redBall != redBall1 && redBall2 == 0) {
					redBall2 = redBall;
				} else if (redBall != redBall1 && redBall != redBall2
						&& redBall3 == 0) {
					redBall3 = redBall;
				} else if (redBall != redBall1 && redBall != redBall2
						&& redBall != redBall3 && redBall4 == 0) {
					redBall4 = redBall;
				} else if (redBall != redBall1 && redBall != redBall2
						&& redBall != redBall3 && redBall != redBall4
						&& redBall5 == 0) {
					redBall5 = redBall;
				} else if (redBall != redBall1 && redBall != redBall2
						&& redBall != redBall3 && redBall != redBall4
						&& redBall != redBall5 && redBall6 == 0) {
					redBall6 = redBall;
				}
			}
			System.out.println(redBall1 + " " + redBall2 + " " + redBall3 + " "
					+ redBall4 + " " + redBall5 + " " + redBall6 + "---"
					+ blueBall);
		}

		sc.close();
	}
}

结果：