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It is found that it is actually an interface. Where is the implementation method? No hurry, it is not difficult to find, the top note of the source code wrote电影讲述四名美国士兵在二战最后几天，在意大利山腰的艰苦攀登中，被一名邪恶冷血的军官捕获，后来得到一位意志不明的忠心耿耿的老人作为他们的引路人。As a result, an exception occurred when newChannel was used, and a FailedChannel was returned after catch, while the outside call thought that it must be a DatagramChannel.Private CPU cpu;第六季即将于今年的9月初亮相，剧中此前消失的朱莉、卡尔等角色都将重新进入观众的视野，而在第五季结尾留下的悬念——披婚纱与迈克步入婚姻殿堂的女主角到底是谁，也即将揭晓。The decision-making power of the policy mode rests with the user. The system itself provides the implementation of different algorithms, adds or deletes algorithms, and encapsulates various algorithms. Therefore, the policy mode is mostly used in the algorithm decision system, and external users only need to decide which algorithm to use.