把 Array 转换成 Map

import java.util.Map;
import org.apache.commons.lang.ArrayUtils;
    public class Main {
        public static void main(String[] args) {
            String[][] countries = { { "United States", "New York" }, { "United Kingdom", "London" },
                    { "Netherland", "Amsterdam" }, { "Japan", "Tokyo" }, { "France", "Paris" } };
            Map countryCapitals = ArrayUtils.toMap(countries);
            System.out.println("Capital of Japan is " + countryCapitals.get("Japan"));
            System.out.println("Capital of France is " + countryCapitals.get("France"));
        }
    }