How to filter null values using Java 8 Stream API

We can make use of the intermediate filter() operation on a stream to filter out the null values as follows.

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

public class Main {

    public static void main(String[] args) {

        List<String> namesList = new ArrayList<>();
        namesList.add("Mike");
        namesList.add("Sam");
        namesList.add(null);
        namesList.add("Alex");
        namesList.add(null);

        List<String> namesWithoutNulls = namesList.stream()
                .filter(Objects::nonNull)
                .toList();

        System.out.println("Name list with nulls: " + namesList);
        System.out.println("Name list without nulls: " + namesWithoutNulls);

    }
}