Java Stream API is a powerful tool introduced in Java 8 for processing collections in a functional style. It allows developers to perform operations like filtering, mapping, and reducing with concise syntax. Here's a quick overview:

📌 Core Concepts

  • Stream: A sequence of elements supporting operations like filter, map, and collect
  • Lambda Expressions: Used to define operations on streams
  • Terminal Operations: Actions that produce a result (e.g., forEach, count)

🧩 Common Operations

  • filter(Predicate<T> predicate): Keeps elements matching a condition
    Java_Stream_API
  • map(Function<T, R> function): Transforms elements
    Stream_Processing
  • reduce(T identity, BiFunction<T, T, T> accumulator): Combines elements into a single value
    Functional_Programming

For deeper exploration, check our Java Stream API tutorial to learn about advanced patterns and best practices. 🌐

📜 Example Code

List<String> names = Arrays.asList("Alice", "Bob", "Charlie");
names.stream()
    .filter(name -> name.length() > 4)
    .map(String::toUpperCase)
    .forEach(System.out::println);
Lambda_Expression

Explore related topics like Java 8 Features to understand how Stream API fits into modern Java development. 🚀