Error starting ApplicationContext

[mrburnwal]

### Parameter 0 of constructor in tech.burnwall.sms.controller.StudentController required a bean of type 'tech.burnwall.sms.service.StudentService' that could not be found.

I Followed each and every step in tutorial but getting this issue. Please guide me what should be done?
Thank You.

[sachindgaikwad0]

Add a public default constructor in your class.

For example.

public User() {
}