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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.Click Exit Flight Simulator赵丽颖饰演成年后的何时雨（高中时期谭松韵饰演），喝醉酒后在一次真心话大冒险的游戏中，报名参加了一个真人秀节目，阴差阳错的要和校园时期有过懵懂爱情的却错过的男同学上真人秀当三个月情侣。成年后的杨洋饰演的男主已经是一个当红明星，与赵丽颖饰演的一个路人女生在电视荧屏上谈三个月恋爱，重拾过去的懵懂爱情，却又因为男主的身份而害怕接近，三个月的情侣假戏真做，男女主角从期待、误会、敞开心扉到假戏真做，再到娱乐圈的绯闻炒作……Decoration pattern:　 此时，一位经验丰富的国际刑警Lee已经对O进行了5年以上的追踪。正是Lee揭露了奥运会神枪手Lok Gan Wah和他年轻的弟弟Lok Tai Wah患上大脑疾病而在比赛失利的事件。这两位神枪手在失去金牌后神秘地消失State mode-Allows an object to automatically change its behavior when its internal state changes, and the object looks like it has changed its class. The specific structure diagram is as follows:二更求粉。