package example.service.impl; import example.dao.ComputerDao; import example.model.Computer; import example.service.IComputerService; import java.sql.SQLException; import java.util.List; public class ComputerServiceImpl implements IComputerService { ComputerDao computerDao=new ComputerDao(); @Override public void addComputer(String name, String brand, String type, String price) { } @Override public List listComputer() throws SQLException { return computerDao.getAllComputer(); } }