Encapsulating behaviour using functional way

Main.java

import java.util.Arrays;
import java.util.List;

public class Main {

	public static void main(String[] args) {

		List<Integer> data = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

		System.out.println("Sum of Even Numbers: "
				+ getTotal(data, new Functional<Integer>() {
					public boolean test(Integer t) {
						return t % 2 == 0;
					}
				}));

		// ...etc..
	}

	private static int getTotal(List<Integer> list, Functional<Integer> func) {
		int total = 0;
		if (list != null) {
			for (Integer intet : list) {
				if (func.test(intet)) {
					total += intet;
				}
			}
		}
		return total;
	}

	static interface Functional<T> {
		boolean test(T t);
	}
}