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SK Mishra
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Document technical questions and best-practice answers.
Java 8 Features
- What Java 8 features or APIs have you frequently used in your projects?
Java 8 Features I Frequently Use
1: Lambda Expressions: Makes code shorter and easier to read by allowing you to write functions inline.
list.forEach(item -> System.out.println(item));
2: Streams API: Helps process collections (like lists) in a simple and efficient way, such as filtering, sorting, or mapping data.
List<String> filtered = list.stream().filter(s -> s.startsWith("A")).collect(Collectors.toList());
3: Functional Interfaces: Used with lambda expressions, like Predicate, Function, and Consumer.
Predicate<Integer> isEven = n -> n % 2 == 0;
4: Default Methods in Interfaces: Allows adding new methods to interfaces without breaking existing code.
interface MyInterface { default void show() { System.out.println("Hello"); } }
5: Optional Class: Helps avoid NullPointerException by handling optional values safely.
Optional<String> name = Optional.ofNullable(getName());
6: Date and Time API (java.time): Makes working with dates and times much easier and less error-prone.
LocalDate today = LocalDate.now();
These features help write cleaner, faster, and safer code in Java.