创建型模式（前引）简单工厂模式Simple Factory

public interface TV
{
    public void play();
}

public class HaierTV implements TV
{
    public void play()
    {
        System.out.println("海尔电视机播放中......");
    }
}

public class HisenseTV implements TV
{
    public void play()
    {
        System.out.println("海信电视机播放中......");
    }    
}

public class TVFactory
{
    public static TV produceTV(String brand) throws Exception
    {
        if(brand.equalsIgnoreCase("Haier"))
        {
            System.out.println("电视机工厂生产海尔电视机！");
            return new HaierTV();
        }
        else if(brand.equalsIgnoreCase("Hisense"))
        {
            System.out.println("电视机工厂生产海信电视机！");
            return new HisenseTV();
        }
        else
        {
            throw new Exception("对不起，暂不能生产该品牌电视机！");
        }
    }
}