import java.util.Arrays;
import java.util.List;
public class Main {
public static void main(String[] args) {
List<Object[]> data = Arrays.asList(
new Object[]{"aaa", 2816},
new Object[]{"bbb", 2322},
new Object[]{"ccc", 4187});
long sum = data.stream().mapToLong(array -> (Integer) array[1]).sum();
System.out.println(sum);
}
}