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Java 8 Key Features and Enhancements

1. Lambda Expressions – Introduced functional-style programming in Java.

2. Functional Interfaces – Interfaces with a single abstract method (e.g., Runnable, Callable, Predicate).

3. Method References – Simplified way to refer to methods using :: operator.

4. Stream API – Provides a functional approach to process collections and data.

5. Optional Class – Helps handle null values and avoid NullPointerException.

6. Collectors Class – Utility class for collecting stream results (e.g., to List, Map, or custom aggregations).

7. StringJoiner Class – A new utility class to join strings with delimiters.

8. Static and Default Methods in Interfaces – Allows interfaces to have concrete methods with implementation.