What are new features of Java 8 #interviewQuestion

Java 8 introduced several significant features:

Lambda Expressions

Syntax: Lambda expressions enable functional programming.
Example:

 List<String> names = Arrays.asList(“Alice”, “Bob”, “Charlie”);
 names.forEach(name -> System.out.println(name));

Stream API

Functional Operations: Stream API facilitates processing collections with functional-style operations.
Example:

 List<String> names = Arrays.asList(“Alice”, “Bob”, “Charlie”);
 long count = names.stream().filter(name -> name.startsWith(“A”)).count();

Date and Time API

Improved API: Provides a comprehensive set of classes for date and time manipulation.
Example:

 LocalDate today = LocalDate.now();
 LocalDateTime dateTime = LocalDateTime.of(today, LocalTime.of(14, 30));

Default Methods in Interfaces

Interface Evolution: Allows adding methods to interfaces without breaking existing implementations.
Example:

 public interface MyInterface {
 default void defaultMethod() {
 System.out.println(“Default method implementation”);
 }
 }

Optional Class

Null Handling: Encourages explicit handling of nullable values to avoid NullPointerException.
Example:

 Optional<String> optionalName = Optional.ofNullable(name);
 optionalName.ifPresent(System.out::println);

Java 8’s features promote cleaner code, improved performance, and better support for modern programming paradigms.