Click here to watch in Youtube :
https://www.youtube.com/watch?v=H4ltBcRYC8E&list=UUhwKlOVR041tngjerWxVccw

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What is Stream | Java 8 streams tutorial | Java 8 streams | Streams in Java 8

StreamDemo.java

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

public class StreamDemo
{
    public static void main(String[] args)
    {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7);

        // get List from Stream Operation
        List<String> result = numbers.stream()
                                     .filter(i -> (i % 2) == 0)
                                     .map(i -> "[" + i + "]")
                                     .collect(Collectors.toList());

        System.out.println(result);
    }
}

[[2], [4], [6]]