@Value Annotation Is Not Working In The Constructor

Question

Why is Spring @Value Annotation not working in the constructor?

I have this Email class that is reading some email related configuration.
In the constructor, if I put a break-point the values are empty.
But if I call the sendEmail method, there are values.

Other Class:

@Autowired
Email sender;

Email Class:

@Component
public class Email{

    @Value("${TO_EMAIL}")
    private String toEmail;

    public Email() {        
        // Here toEmail is null 
    }

    public void sendEmail(String subject, String body) {
        // Here toEmail has value
    }
}

Answer 1

As far I remember, the value injection occurs after the constructor call.

Try to change your constructor to this:

public Email(@Value("${TO_EMAIL}") String toEmail) { 
   this.toEmail = toEmail;
}