GuavaEvensFilter.java

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;

public class GuavaEvensFilter {

    public static void main (String [] args)
    {
        // Prints "[2, 4]"
        System.out.println(
            Iterables.filter(
                Lists.newArrayList(1, 2, 3, 4),
                new Predicate<Integer>() {
                    public boolean apply(Integer x) {
                        return x % 2 == 0;
                    }
                })
        );
    }
}