What is the purpose of using streams in the new version of Java?

Simplification of working with data collections.

Main goals:

• Functionality: Allow the use of lambda expressions and other functional interfaces for declarative data processing.
• Parallelism: Facilitate parallel operations on collections without explicit thread management.
• Immutability: Streams do not modify the original collection. Stream operations create new streams or a final result.
• Performance: Lazy evaluation enables operations to be performed only as needed.
• Readability: Code becomes more concise and expressive compared to traditional loops.

Example of usage:

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class StreamExample {
    public static void main(String[] args) {
        List<String> fruits = Arrays.asList("apple", "banana", "orange", "grape");

        // Filtering and transforming using streams
        List<String> filteredFruits = fruits.stream()
                                           .filter(s -> s.startsWith("a")) // Keep only those starting with "a"
                                           .map(String::toUpperCase)     // Convert to uppercase
                                           .collect(Collectors.toList());   // Collect into a new list

        System.out.println(filteredFruits); // Output: [APPLE]
    }
}

In the end, streams make code more modern, efficient, and readable when working with data collections.