如何通过流java8中的键获取所有不同的值

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        List<String> list = Arrays.asList("apple", "banana", "apple", "orange", "banana", "grape");

        List<String> distinctValues = list.stream()
                .distinct()
                .collect(Collectors.toList());

        System.out.println("Distinct values: " + distinctValues);
    }
}

Distinct values: [apple, banana, orange, grape]