1. The advantages are abstraction and separation, and strong scalability. It complies with the principle of opening and closing and the principle of synthesis and reuse. Achieve transparent details to customers.
2. The disadvantage is that it increases the difficulty of system understanding and design.
Since the aggregation relationship is established at the abstraction layer, developers are required to design and program abstractions to correctly identify two independently changing dimensions in the system.
Example
public class Client { public static void main(String[] args) { OperatingSystemVersion os = new Mac(new AVIFile()); os.play("战狼3"); /** * 输出:Mac正在播放:avi视频文件:战狼3 */ } }
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