How can the probability algorithm for a lottery be implemented in Java?

The probability algorithm for a raffle can be implemented in Java using the following method:

1. Firstly, determine the probability of winning for each award.
2. Create a list containing all the prizes, and add each prize to the list in proportion to its winning probability. For example, if there are 3 prizes with winning probabilities of 30%, 40%, and 30% respectively, the list should have 3 prizes of 30%, 4 of 40%, and 3 of 30%.
3. Generate a random number using the Random class, then use this number to select a prize from the list as the winning result.

Here is a simple example code:

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

public class Lottery {

    public static void main(String[] args) {
        List<String> prizes = new ArrayList<>();
        prizes.add("奖品1");
        prizes.add("奖品2");
        prizes.add("奖品3");

        List<String> lotteryList = new ArrayList<>();
        lotteryList.add("奖品1");
        lotteryList.add("奖品1");
        lotteryList.add("奖品1");
        lotteryList.add("奖品2");
        lotteryList.add("奖品2");
        lotteryList.add("奖品2");
        lotteryList.add("奖品2");
        lotteryList.add("奖品3");
        lotteryList.add("奖品3");
        lotteryList.add("奖品3");

        Random random = new Random();
        int index = random.nextInt(lotteryList.size());
        String prize = lotteryList.get(index);

        System.out.println("中奖奖品为：" + prize);
    }
}

In this example, we start by creating a list called prizes containing 3 prizes, then we add each prize to a lotteryList based on the probability of winning. Finally, we use the Random class to generate a random number and select a prize from the lotteryList as the winning result based on this random number.