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悬崖边上的魔术师和不健康的恶魔姐姐的王道幻想开幕！Object that executes this method.河西休屠王和浑邪王的军队还遥遥无期，是指望不上了，唯一寄希望的就是左贤王所部。Singleton is a common design pattern. In Java applications, a singleton object can ensure that only one instance of the object exists in a JVM. This model has several advantages:The green arrow at the bottom indicates that it can be passed. Some ticket gates are two-way. When someone comes towards him, the green arrow will turn into a red fork.以民国初期为背景,讲述海城那时是一个动荡不安的年代，叱咤风云的人物不下百人，但白天在路上却只能看到大街上贴着那几张抓捕同盟会革命党的通缉令，可一到晚上，一幕幕黑帮争斗的场面就像一座大舞台上演着丰富、多采的人间戏剧。在海城专做码头生意的祝家与钟家是死对头，有一天晚上钟家惨遭黑帮灭门，钟家的小少爷虽侥幸活了下来，有棵子弹却永远留在他头中，但子弹会慢慢把他的记忆抹擦掉，深陷危机的他探求真相，一段环环相扣的凶案,幕后真凶改变了他的命运,让昔日情人反目成仇。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.