Java实现Random随机数生成双色球号码

import java.util.HashSet;
import java.util.Random;
import java.util.Set;

public class DoubleColorBall {
    private static final int RED_BALL_COUNT = 6;
    private static final int RED_BALL_MAX = 33;
    private static final int BLUE_BALL_MAX = 16;

    public static void main(String[] args) {
        Set<Integer> redBalls = generateRedBalls();
        int blueBall = generateBlueBall();

        System.out.println("双色球号码：");
        System.out.println("红球：" + redBalls);
        System.out.println("蓝球：" + blueBall);
    }

    private static Set<Integer> generateRedBalls() {
        Set<Integer> redBalls = new HashSet<>();
        Random random = new Random();

        while (redBalls.size() < RED_BALL_COUNT) {
            int redBall = random.nextInt(RED_BALL_MAX) + 1;
            redBalls.add(redBall);
        }

        return redBalls;
    }

    private static int generateBlueBall() {
        Random random = new Random();
        return random.nextInt(BLUE_BALL_MAX) + 1;
    }
}