DoubleStream findFirst() example
Description
DoubleStream findFirst() returns an
OptionalDouble describing the first element of this stream,
or an empty OptionalDouble if the stream is empty.
Syntax
findFirst has the following syntax.
OptionalDouble findFirst()
Example
The following example shows how to use findFirst.
import java.util.OptionalDouble;
import java.util.stream.DoubleStream;
/* w w w . j a va 2 s. c o m*/
public class Main {
public static void main(String[] args) {
DoubleStream b = DoubleStream.of(1.1,2.2,3.3,4.4,5.5);
OptionalDouble d = b.findFirst();
if(d.isPresent()){
System.out.println(d.getAsDouble());
}else{
System.out.println("no data");
}
}
}
The code above generates the following result.
