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FlyWeightFactory is responsible for creating and managing meta-units. When a client requests, the factory needs to check whether there are eligible objects in the current object pool. If so, it returns the existing object. If not, it creates a new object. FlyWeight is a superclass. When it comes to shared pools, It is easy to think of JDBC connection pooling in Java, Considering the characteristics of each connection, It is not difficult for us to sum up: Applies to several objects that are shared, They have some common attributes, Take the database connection pool as an example, url, driverClassName, username, password and dbname, these attributes are the same for each connection, so it is suitable to use the meta-sharing mode to process, build a factory class, take the above similar attributes as internal data and the others as external data, and pass them in as parameters when calling methods, thus saving space and reducing the number of instances.看来这徐家还真是可以的。从半年前起，不畅销的小说家道间慎（野田洋次郎 饰）和突如其来的五位美女一起开始了同居生活。这五人女人年龄从十几岁到30岁不等，每月支付他一百万日元的生活费，条件是对于她们的身世和一切行动，他完全不能过问。她们究竟是抱着何种目的在此生活、她们究竟是什么人，以及她们平时都做些什么，道间慎一点点地解开这些谜题。就在他开始感到和这五个人在一起生活很幸福时，发生了一件足以毁掉他全部生活的事情……下塘集附近的乡民对青山书院的读书人有一种天生的尊重和敬畏，所以胡周根本没费什么事，敲开一家农户，把情况一说，热心的老汉就帮他张罗了一辆牛车，铺上棉褥子，又喊了几个汉子过来帮忙。A method of chemically depositing a thin layer of metal coating layer on a certain substrate metal by partial replacement of the substrate metal.《兵临村下》以抗日战争时期为背景，讲述曹云金饰演的钱贵从装瞎算命到误打误撞投入战斗，从与鬼子周旋直到走上革命道路的历程。