Stream flatMap(Function mapper) example
Description
Stream flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
returns a stream by replacing this stream with a mapped stream by applying the provided mapping function.
Syntax
flatMap has the following syntax.
<R> Stream<R> flatMap(Function<? super T,? extends Stream<? extends R>> mapper)
Example
The following example shows how to use flatMap.
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
//from w w w .j av a2s. co m
public class Main {
public static void main(String[] args) {
List<String> stringList = Arrays.asList("1.2","2.2","3","4","5");
stringList.stream()
.flatMap(n-> Stream.of(n) )
.forEach(System.out::println);
}
}
The code above generates the following result.
