functional programming

java 8 streams

package net.sness;
import java.util.*;
import java.util.stream.Stream;
public class TestMax {
    public static void main(String[] args) {
        Collection<String> strings = Arrays.asList("one", "two", "three");
        Optional<String> longest = strings.stream()
                .max(Comparator.comparingInt(String::length));
        System.out.println("longest=" + longest.get());
    }
}