模板方法模式（Template Pattern）

public abstract class HummerModel {

    public HummerModel() {
        
    }

    public abstract void start();
    public abstract void stop();
    public abstract void alarm();
    public abstract void engineBoom();
    
    public void run()
    {
        start();
        engineBoom();
        alarm();
        stop();
    }

}

public class HummerH1Model extends HummerModel {

    @Override
    public void start() {
        System.out.println("Hummer H1 start");
    }

    @Override
    public void stop() {
        System.out.println("Hummer H1 Stop");
    }

    @Override
    public void alarm() {
        System.out.println("Hummer H1 alarm");
    }

    @Override
    public void engineBoom() {
        System.out.println("Hummer H1 engine boom");
    }

}

public class HummerH2Model extends HummerModel {

    @Override
    public void start() {
        System.out.println("Hummer H2 start");
    }

    @Override
    public void stop() {
        System.out.println("Hummer H2 Stop");
    }

    @Override
    public void alarm() {
        System.out.println("Hummer H2 alarm");
    }

    @Override
    public void engineBoom() {
        System.out.println("Hummer H2 engine boom");
    }

}