Java 8 introduced several groundbreaking features that revolutionized modern development. Here's a quick overview of the most impactful ones:
1. Lambda Expressions 📌
Simplify functional interfaces with concise syntax.
Example:
list.forEach(item -> System.out.println(item));
2. Stream API 🧾
Process collections with declarative operations.
filter()
for data filteringmap()
for transformationreduce()
for aggregation
3. Optional Class 🛑
Avoid null checks by using Optional<T>
.
Optional<String> value = Optional.ofNullable(fetchData());
4. Default Methods in Interfaces 🔄
Add backward compatibility to interfaces.
interface MyInterface {
default void myMethod() { /* implementation */ }
}
5. Date & Time API ⏳
Replace outdated Date
classes with java.time
.
LocalDate
,LocalTime
,LocalDateTime
ZonedDateTime
for timezone-aware operations
For deeper exploration, check our Java 8 tutorial or Stream API guide.