Cannot convert java.util.Optional with stream

Question

I\'m trying to use stream in java, i had a student class:

@Entity
@Data @AllArgsConstructor @NoArgsConstructor
public class Student {
    @Id @GeneratedValue(str         


        

Answer 1

Thank you all, your answers helped me to derive a solution:

List students= Arrays.stream(empIds)
                .mapToObj(id->
                   studentRepository.findById(id).get())
                .collect(Collectors.toList());

And the response of deadpool is great also, we have to add .map(Optional::get) to get the stream of student because studentRepository::findById return stream of optioanl that's why the error.

List students= Arrays.stream(empIds)
                .mapToObj(studentRepository::findById)
               // .filter(Optional::isPresent)
                .map(Optional::get)
                .collect(Collectors.toList());