| ✅ | ❌ Don’t | |---|---| | Use IntStream , LongStream , DoubleStream for primitives. | Use Stream<T> for primitives – it forces boxing. | | Keep the pipeline stateless (no mutable shared state). | Mutate external collections inside map / filter . | | Prefer method references ( String::trim ) when they improve readability. | Write overly complex lambda bodies; split into helper methods. | | Leverage collect(Collectors.groupingBy(...)) for aggregations. | Write manual loops for grouping – it’s error‑prone. | | Test both sequential and parallel versions on realistic data sizes. | Assume parallel is always faster. |
| Goal | Traditional Anonymous Class | Lambda | |------|-----------------------------|--------| | Comparator<Integer> that sorts descending | new Comparator<Integer>() public int compare(Integer a, Integer b) return b - a; | (a, b) -> b - a | | Predicate<String> that checks length > 5 | new Predicate<String>() public boolean test(String s) return s.length() > 5; | s -> s.length() > 5 | CJOD-337-EN-JAVHD-TODAY-1027202202-19-15 Min
Implement a pattern recognition algorithm that can identify and break down the components of the given string into its constituent parts (identifier, language, content type, release indicator, date/time, and duration). | ✅ | ❌ Don’t | |---|---| |