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明鉴？永平帝看着伏地不起胡敦，觉得是该了断一下了。　　叶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.小苞谷敬上高凡反复默看了几遍，都会背了，也没看出蹊跷来。板栗瞅着老和尚微笑不语。黄瓜看着两个表弟煞白的脸色，忍笑道：没伤着。The front and rear brake systems of BMW 3 Series 2018 330i M Sports Obsidian Night Edition are all ventilated. The rear brake disc adopts a common drum structure in the disc, and the drum part is internally designed with a parking brake mechanism. However, the configuration of brake calipers is slightly ordinary, and the front and rear brake systems are equipped with single floating calipers.