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从零开始学Java之abstract修饰符与抽象类、抽象方法
经过前面几篇文章的讲解,我们现在已经对面向对象有了基本的认知,掌握了面向对象的三大特征:封装、继承和多态。这三个特征可以说是面向对象的核心基础,任何一个合格的Java程序员都必须对此熟练掌握。但是只掌握三大特征还不够,面向对象中还有其他 ...
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