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? Starting from this section, we introduce in detail the concepts and application scenarios of 23 design patterns in Java, and analyze them in combination with their characteristics and the principles of design patterns.If an application uses a large number of objects, and a large number of these objects cause a large storage overhead, it should be considered. Also, most of the states of the object are external states. If you delete the external states of the object, you can replace many groups of objects with relatively few shared objects, or you can consider using the meta-sharing mode.穷人的娃儿早当家，就是这个理。　　宿命推动着亚瑟，去寻找失落已久的三叉戟，建立一个更加开明的海底王国……千年以前，世界上存在着两个有着相同实力的强大的国家。一个是由被称为“拉法艾尔之瞳”的神所加护的巴尔斯布鲁克帝国，以及由名为“弥卡艾尔之眼”的神所加护的拉古斯王国。两国之间为了维护世界和平而订立协定，长期以来互相合作。不过就在十年前，传言恶之死神“ 费亚罗廉”的身体将继续沉眠。围绕着装有费亚罗廉沉睡千年肉体的“潘多拉之盒”引发了激战，导致了拉古斯王国的毁灭。据巴尔斯布鲁克帝国的史书所记载的历史称，是因为拉古斯王国打算取得两块圣石——『拉法艾尔之眼』和『弥卡艾尔之眼』，而破坏了双方的协定。最后和巴尔斯布鲁克帝国对立而走向毁灭。似这等人，朝廷当然要不拘一格录用，国家方能大兴。