Convert Optional String to String

1. Convert Optional String to String – If you are using Java 8 trying to find to convert Convert Optional<String> to String value then you can use below code:

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.Optional;

public class ConvertOptionalToString {

    public static void main(String[] args) {
        List<String> stringList = new ArrayList<>();
        stringList.add("JavaHonk1");
        stringList.add("JavaHonk2");
        stringList.add("JavaHonk3");
        stringList.add("JavaHonk4");

        Optional<String> value = stringList.stream().findFirst();

        String firstValue = value.orElse("");
        System.out.println("Optional to String: " +firstValue);

        //You can directly usin map to convert String
        String mapValue = stringList.stream().findFirst().map(Objects::toString)
                .orElse("");

        System.out.println("Using map: " + mapValue);


    }
}

2. Output:

3. Reference Oracle Java 8