DIP Solution Part 2

D_DependencyInversionSolution.java

public class D_DependencyInversionSolution {

    private static class AuthenticateLogin {
        private final Authentication authentication;

        private AuthenticateLogin(Authentication authentication) {
            this.authentication = authentication;
        }

        public boolean login(User user){
            return authentication.login(user);
        }
    }

    public static void main(String[] args) {
        User user = new User("email@mail.com", "123");

        AuthenticateLogin authenticateLogin = new AuthenticateLogin(new AuthenticationLinkedin());
        authenticateLogin.login(user);
    }
}