public Database() {
        try {
            Class.forName("org.postgresql.Driver");
        } catch (ClassNotFoundException cnfe) {
            System.out.println("" + cnfe);
        }
        try {
            Connection connection = DriverManager.getConnection("jdbc:postgresql://localhost:5432/tomcat", "root", "root");
            statement = (Statement) connection.createStatement();
        } catch (SQLException ex) {
            Logger.getLogger(create.class.getName()).log(Level.SEVERE, null, ex);
        }

    }