Factory Pattern: Factory Pattern is a frequently used pattern. Classes implemented according to Factory Pattern can generate instances of one of a group of classes according to the provided data. Usually, this group of classes has a common abstract parent class and implements the same methods, but these methods perform different operations for different data. First of all, we need to define a base class. Subclasses of this class implement methods in the base class through different methods. Then you need to define a factory class that can generate different subclass instances according to conditions. After getting an instance of a subclass, developers can call methods in the base class regardless of which subclass instance is returned.
当真是个烫手的山芋，两难选择。
Updated July 16
猛龙刁拳
2. After entering Google Earth, click Enter Flight Simulator in the toolbar.
Ten, Terrain Modeling, Road Projection and Surface Plant Generation
Select the appropriate system.
Robert Pool)
When the playerDirector opens an exposed interface ReceiveMessage, it is responsible for receiving the message sent by the player object. When the player object sends the message, it always sends its own this to the playerDirector as a parameter so that the playerDirector can identify the player object from which the message comes.
众人都点头。
一天晚上，Admed国王年轻的侄子Oman发起叛变，在Sharif面前将Admed国王处死。
众人顿时都露出了笑脸，一扫刚才的沉痛。
《2017变形计》是由芒果TV独家自制的纪实类栏目，禀承湖南卫视《变形计》“换位思考”这一理念，而且更推至极致，在节目中，你不仅要站在对方立场去设想和理解对方，你还要去过对方的生活，真正体验对方世界的大小风云，品察对方思想最微妙的情绪触动。
都是那个丧门星，教出一帮黑心烂肝的小崽子。
At this point, Zhao Mucheng was still as calm as at the beginning, holding the fishing rod firmly in his hand, repeatedly using "I don't remember" to resist the questioning of details, and did not see any resistance or irritability.
项羽进帐之后，宴会安排的作为做了些调整，项羽东向而坐，项伯也在动向靠后的一些位置落座，不过这次他多了一位新邻居——绍、兴侯爷尹旭。
二更。
不要用这种拙劣的谎话。
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