In this tutorial, we will see “How to filter null values from ArrayList in Java 8?”. In order to remove null from the list, we are going to use Stream API introduced in Java 8.
In the below specified example, I’ve explained 2 different code approaches to achieve the same output:
- Anonymous Implementation
- Lambda Implementation
Filter/Remove null values from a List using Stream in Java 8...!!! Share on X
Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | import java.util.ArrayList; import java.util.List; import java.util.function.Consumer; import java.util.function.Predicate; public class Filter_Null_List_Java8_Stream_Example { public static void main(String[] args) { List <String> users = new ArrayList <String> (); users.add("noni"); users.add("yogi"); users.add("null"); users.add("null"); users.add("isha"); users.add("yashi"); users.add("yashu"); users.add("null"); //Original List System.out.println("Original List:\n"); users.stream().forEach(System.out::println); //List after removing 'Null' values // 1. Anonymous Implementation System.out.println("\nNew List after removing 'null' (Anonymous Impl):\n"); users.stream().filter(new Predicate <String> () { @Override public boolean test(String t) { return !t.contains("null"); } }).forEach(new Consumer <String> () { @Override public void accept(String t) { System.out.println(t); } }); System.out.println("\n"); //List after removing 'Null' values // 2. Lambda Implementation System.out.println("New List after removing 'null' (Lambda Impl):\n"); users.stream().filter(t - > !t.contains("null")).forEach(System.out::println); } } |
Output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | Original List: noni yogi null null isha yashi yashu null New List after removing 'null' (Anonymous Impl): noni yogi isha yashi yashu New List after removing 'null' (Lambda Impl): noni yogi isha yashi yashu |
Filter/Remove null values from a List using Stream in Java 8...!!! Share on X
Do you like this Post? – then check my other helpful posts:
- Double the even / odd numbers of a specified ArrayList using Streams
- Double the numbers of specified ArrayList using Streams
