New Features in Java 8
Java 8 introduced several significant features:
Lambda Expressions
Syntax: Lambda expressions enable functional programming.
Example:
names.forEach(name -> System.out.println(name));
Stream API
Functional Operations: Stream API facilitates processing collections with functional-style operations.
Example:
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:
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:
default void defaultMethod() {
System.out.println(“Default method implementation”);
}
}
Optional Class
Null Handling: Encourages explicit handling of nullable values to avoid NullPointerException.
Example:
optionalName.ifPresent(System.out::println);
Java 8’s features promote cleaner code, improved performance, and better support for modern programming paradigms.