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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.Xun Yu only provides halo, not flat A.AbstractCalculator is an auxiliary class that provides auxiliary methods. Next, implement each of the following classes in turn:你……我如此宠爱于你，你竟然如此狼心狗肺……范文轩看到如雪的时候，愤怒不已，怒目圆睁地伸手喝骂。First, use the strategic mode to calculate the bonus;基于Sarah Vaughan所著同名畅销小说，聚焦英国特权精英的丑闻和被卷入其中的女性。原著讲述一名雄心勃勃的威斯敏斯特政客在被控强奸后婚姻破裂的故事，妻子相信丈夫是无辜的，而控方律师同样坚信他是有罪的。(four) did not record the changes of registered fire engineers or the catalogue of fire technical service items, issued a written conclusion document;