import org.apache.commons.collections4.CollectionUtils; import org.apache.commons.collections4.Predicate; import java.util.ArrayList; import java.util.List; public class ElementFilterAndTransformExample { public static void main(String[] args) { List<Integer> numbers = new ArrayList<>(); numbers.add(5); numbers.add(12); numbers.add(8); numbers.add(15); numbers.add(3); Predicate<Integer> filterPredicate = input -> input < 10; CollectionUtils.filter(numbers, filterPredicate); CollectionUtils.transform(numbers, String::toUpperCase); System.out.println(numbers); } }