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#1.观察者模式 示例文件代码:watchAndbeWatcherdcode.java 内容包含4个类: 抽象主题类、抽象观察者类、具体主题类、具体观察者类。
温故知新,用java语言来实现一些常见的设计模式,并简化互联网上一些复杂的讲解。所谓设计模式,就是一种范式,利用面向对象语言的特性来实现一些稍复杂的需求,是一种经验的总结。
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