如何在JAVA8中将映射数组转换为映射？

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

public class Main {
    public static void main(String[] args) {
        String[][] mappingArray = {{"key1", "value1"}, {"key2", "value2"}, {"key3", "value3"}};

        Map<String, String> mapping = Arrays.stream(mappingArray)
                .collect(Collectors.toMap(entry -> entry[0], entry -> entry[1]));

        System.out.println(mapping);
    }
}