What are Java 8 new features? Which of these have you used?

Question

Accepted Answer

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

Lambda expressions: Enable functional programming in Java by expressing instances of single-method interfaces (functional interfaces) concisely.
Functional interfaces: Interfaces with a single abstract method, such as java.util.function.Function or java.util.function.Predicate.
Streams: Allow for processing sequences of elements in a functional style, supporting operations like filter, map, reduce, and collect.
Default methods: Provide a way to add new methods to interfaces without breaking existing implementations.
Optional class: A container object which may or may not contain a non-null value, helping to avoid null pointer exceptions.

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