Choose a random option

RandomOptionChooser.java

import static java.util.Collections.shuffle;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toList;
import java.util.Optional;
import java.util.stream.Collector;
import java.util.stream.Stream;

public class RandomOptionChooser {
  
  public Optional<Option> randomlyChooseAnOption(@lombok.NonNull final String... options) {
    return randomlyChooseAnOption(Stream.of(options).map(Option::new).toArray(Option[]::new));
  }
 
  public Optional<Option> randomlyChooseAnOption(@lombok.NonNull final Option... options) {
    return Stream.of(options).map(Option::new).collect(toSetAndShuffle()).findFirst();
  }

  @lombok.Value
  private static class Option {
    private final String name;

    @Override
    public String toString() {
      return name;
    }
  }

  private static <T> Collector<T, ?, Stream<T>> toSetAndShuffle() {
    return collectingAndThen(
        toList(),
        a -> {
          shuffle(a);
          return a.stream();
        });
  }
}