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The code for creating the object is encapsulated and the specific factory class is instantiated, thus achieving the purpose of encapsulation and instantiation. Encapsulating the code that creates the object in one place can also achieve the purpose of reuse and is more convenient for later maintenance. This also means that when the customer instantiates the object, he will only rely on the interface and not on the specific implementation. Help us to better achieve interface programming rather than implementation, making the code more flexible to cope with future extensions.谁让大靖如今能人辈出呢。富家子弟学津（刘德华 饰）自命不凡，多次恋爱后均迅速对对方无感觉，经常在订婚分手。这次，学津看上了来自上海的女服务生文青（瞿颖 饰），文青大方得体，和学津以及他的家人朋友都很聊得来。于是，学津准备与文青一起乘豪华邮轮作远洋旅游，并在船上举行盛大的订婚仪式。她要是想家了，就回来住几个月。　　和李二牛苦不堪言，但他们在训练场上互不相让，生活中相互关心，包揽了训练成绩的前三名，他们脱颖而出，成为了特种兵中的特种兵，与飞行员宋凯飞、来自武术世家的徐天龙组成了“红细胞”小组。长期未充分就业的夫妇詹恩和板球梅尔菲谁自称是家庭装修“专家”，他们更有信心，他们是电视下一个伟大的家庭设计名人组合。