<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.4</version> </dependency> List<User> userList = Arrays.asList( new User("Alice", 25), new User("Bob", 30), new User("Charlie", 35) ); CollectionUtils.select(userList, user -> user.getAge() < 30); CollectionUtils.forAllDo(userList, user -> user.setAge(user.getAge() + 5));