Java 双色球号码生成器 - 随机生成彩票号码

import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; import java.util.List; import java.util.Random;

public class DoubleColorBallGenerator { public static void main(String[] args) { List redBalls = generateRedBalls(); int blueBall = generateBlueBall(); Collections.sort(redBalls); output(redBalls, blueBall); }

public static List<Integer> generateRedBalls() {
    List<Integer> redBalls = new ArrayList<>();
    Random random = new Random();
    while (redBalls.size() < 6) {
        int redBall = random.nextInt(33) + 1;
        if (!redBalls.contains(redBall)) {
            redBalls.add(redBall);
        }
    }
    return redBalls;
}

public static int generateBlueBall() {
    Random random = new Random();
    return random.nextInt(16) + 1;
}

public static void output(List<Integer> redBalls, int blueBall) {
    System.out.print('双色球号码：');
    Iterator<Integer> iterator = redBalls.iterator();
    while (iterator.hasNext()) {
        System.out.print(iterator.next() + ' ');
    }
    System.out.print('+ ' + blueBall);
}

}