/**

* Day 28 - Streams API

*/

import java.util.*;

import java.util.stream.*;

public class StreamsExample {

public static void main(String[] args) {

System.out.println("=== Streams API ===\n");

List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

System.out.println("--- Filter ---");

numbers.stream()

.filter(n -> n % 2 == 0)

.forEach(System.out::println);

System.out.println("\n--- Map ---");

numbers.stream()

.map(n -> n * n)

.forEach(System.out::println);

System.out.println("\n--- Reduce ---");

int sum = numbers.stream()

.reduce(0, (a, b) -> a + b);

System.out.println("Sum: " + sum);

System.out.println("\n--- Collect ---");

List<Integer> doubled = numbers.stream()

.map(n -> n * 2)

.collect(Collectors.toList());

System.out.println("Doubled: " + doubled);

}

}