<dependencies> <dependency> <groupId>com.github.underscore</groupId> <artifactId>underscore</artifactId> <version>1.6.0</version> </dependency> </dependencies> import com.github.underscore.Underscore; List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10); List<Integer> evenNumbers = Underscore.filter(numbers, n -> n % 2 == 0); Function<Integer, Integer> addOne = n -> n + 1; Function<Integer, Integer> multiplyByTwo = n -> n * 2; Function<Integer, Integer> addOneAndMultiplyByTwo = Underscore.compose(addOne, multiplyByTwo);