class TestModems {
    public static void main(String[] arguments) {
        CableModem roadRunner = new CableModem();
        DslModem bellSouth = new DslModem();
        roadRunner.speed = 500000;
        bellSouth.speed = 400000;
        System.out.println("Trying the cable modem:");
        roadRunner.displaySpeed();
        roadRunner.connect();
        System.out.println("Trying the DSL modem:");
        bellSouth.displaySpeed();
        bellSouth.connect();
    }
}