如何在Java中从List<String[]>中获取具有频率的唯一值？

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class FrequencyCounter {
    public static Map<String, Integer> getUniqueValueFrequency(List<String[]> list) {
        Map<String, Integer> frequencyMap = new HashMap<>();

        for (String[] array : list) {
            for (String element : array) {
                if (frequencyMap.containsKey(element)) {
                    frequencyMap.put(element, frequencyMap.get(element) + 1);
                } else {
                    frequencyMap.put(element, 1);
                }
            }
        }

        return frequencyMap;
    }

    public static void main(String[] args) {
        List<String[]> list = List.of(
                new String[]{"apple", "banana", "apple"},
                new String[]{"orange", "banana", "orange", "grape"},
                new String[]{"apple", "grape", "grape"}
        );

        Map<String, Integer> frequencyMap = getUniqueValueFrequency(list);

        for (Map.Entry<String, Integer> entry : frequencyMap.entrySet()) {
            System.out.println("Value: " + entry.getKey() + ", Frequency: " + entry.getValue());
        }
    }
}