如何在EL Stream API中使用Collectors#joining？

String result = stream.collect(Collectors.joining());

String result = stream.collect(Collectors.joining(", "));

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

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

        String result = fruits.stream()
                .collect(Collectors.joining(", "));

        System.out.println(result);
    }
}

apple, banana, orange