Java 8 Streams - DoubleStream.findAny Examples

package com.logicbig.example.doublestream;

import java.util.OptionalDouble;
import java.util.stream.DoubleStream;

public class FindAnyExample {

    public static void main(String... args) {
        System.out.println("-- sequential --");
        DoubleStream ds = DoubleStream.of(1.0, 1.2, 2.0, 2.4, 3.0);
        OptionalDouble any = ds.findAny();
        System.out.println(any.orElse(-1));

        System.out.println("-- parallel --");
        DoubleStream ds2 = DoubleStream.of(1.0, 1.2, 2.0, 2.4, 3.0);
        OptionalDouble any2 = ds2.parallel()
                                 .findAny();
        System.out.println(any2.orElse(-1));
    }
}

package com.logicbig.example.doublestream;

import java.util.OptionalDouble;
import java.util.stream.DoubleStream;

public class FindAnyExample2 {

    public static void main(String... args) {
        DoubleStream ds = DoubleStream.empty();
        OptionalDouble optionalDouble = ds.findAny();
        System.out.println(optionalDouble.isPresent());
    }
}