Java抽奖程序开发指南：从基础实现到性能优化，轻松构建随机抽奖系统

Random random = new Random(); int luckyNumber = random.nextInt(100); // 生成0-99的随机数

public class BasicLottery {

private List<String> prizes = Arrays.asList("一等奖", "二等奖", "三等奖", "四等奖", "谢谢参与");
private Random random = new Random();

public String draw() {
    int index = random.nextInt(prizes.size());
    return prizes.get(index);
}

}

public class PreheatedRandom {

private Random random = new Random();

// 在系统启动时预热
public void preheat() {
    for (int i = 0; i < 1000; i++) {
        random.nextInt();
    }
}

}