如何使用hashmap统计骰子眼球频率？

import java.util.HashMap;

public class DiceFrequency {
    public static void main(String[] args) {
        int[] dice = {1, 2, 3, 4, 5, 6}; // 骰子的点数
        int totalThrows = 100; // 骰子的总投掷次数

        HashMap<Integer, Integer> frequencyMap = new HashMap<>();

        // 投掷骰子并统计频率
        for (int i = 0; i < totalThrows; i++) {
            int diceNumber = dice[(int) (Math.random() * 6)]; // 随机获取一个点数
            if (frequencyMap.containsKey(diceNumber)) {
                frequencyMap.put(diceNumber, frequencyMap.get(diceNumber) + 1);
            } else {
                frequencyMap.put(diceNumber, 1);
            }
        }

        // 输出结果
        for (int diceNumber : frequencyMap.keySet()) {
            int frequency = frequencyMap.get(diceNumber);
            System.out.println("点数 " + diceNumber + " 出现的频率为 " + frequency);
        }
    }
}