Java Stream count() Example

In this tutorial, we will learn Java 8 Stream count() terminal operation with an example.

The Java Stream count() method is a terminal operation that starts the internal iteration of the elements in the Stream and counts the elements. 

Java Stream count() Example

Here is a Java Stream count() example:
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class Main {
    public static void main(String[] args)
    {
        List<String> stringList = new ArrayList<String>();

        stringList.add("one");
        stringList.add("two");
        stringList.add("three");
        stringList.add("four");
        stringList.add("five");

        Stream<String> stream = stringList.stream();

        long coutElements = stream
                .map(value -> value.toUpperCase())
                .count();

        System.out.println(coutElements);

    }
}

Output:

5

Java Stream Methods/APIs Examples

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