Get Even Numbers Using Java Stream API

Java Stream API — Get Even Numbers

Example 1 — Filter even numbers from a list

Creates a list, uses Stream to filter evens, and prints them.

import java.util.*;
import java.util.stream.*;

public class EvenNumbersStream {
    public static void main(String[] args) {
        // Create a list of numbers
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

        // Use Stream API to filter even numbers
        List<Integer> evenNumbers = numbers.stream()
                                           .filter(n -> n % 2 == 0)
                                           .collect(Collectors.toList());

        // Print the even numbers
        System.out.println("Even numbers: " + evenNumbers);
    }
}
        

Example 2 — Use IntStream.rangeClosed over a range

Generates numbers in a range and prints the evens directly.

import java.util.stream.*;

public class EvenNumbersStreamRange {
    public static void main(String[] args) {
        System.out.println("Even numbers from 1 to 20:");
        IntStream.rangeClosed(1, 20)
                 .filter(n -> n % 2 == 0)
                 .forEach(System.out::println);
    }
}
        

Tip: Change the range or the list contents to suit your needs.