抽象类如何实例化对象
时间: 2023-10-22 12:28:20
浏览: 66
抽象类无法直接实例化,因为抽象类是一种不完整的类,它只定义了一些方法和属性,并没有具体的实现。要实例化一个抽象类的[对象](https://geek.csdn.net/educolumn/04c51611e4b730957464192e0307b82c?spm=1055.2569.3001.10083),需要创建一个继承该抽象类的子类,并在子类中实现抽象类中的所有抽象方法。通过父类的引用指向子类的实例,间接地实现了父类的实例化。这样,就可以通过子类的[对象](https://geek.csdn.net/educolumn/04c51611e4b730957464192e0307b82c?spm=1055.2569.3001.10083)来访问抽象类中定义的方法和属性。在Java中,可以使用关键字"new"来实例化子类的[对象](https://geek.csdn.net/educolumn/04c51611e4b730957464192e0307b82c?spm=1055.2569.3001.10083),然后通过父类的引用指向该[对象](https://geek.csdn.net/educolumn/04c51611e4b730957464192e0307b82c?spm=1055.2569.3001.10083)。例如,在给定的代码示例中,抽象类A通过子类B的实例化而间接地实例化了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [Java实例化一个抽象类对象的方法教程](https://download.csdn.net/download/weixin_38553648/12767101)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chat[gpt](https://geek.csdn.net/educolumn/d2f82220638caf1d7a0d5521eb7b6775?dp_token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6NDQ0MDg2MiwiZXhwIjoxNzA5NTQ4NzEwLCJpYXQiOjE3MDg5NDM5MTAsInVzZXJuYW1lIjoid2VpeGluXzY4NjQ1NjQ1In0.Ycp4bmJnbuf-GXluSQA922QiehPy9qQiboAgoDqZFno&spm=1055.2569.3001.10083)_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50