Java抽象类 Java接口抽象类和接口使用区别： activity 深度继承关系

ZhangJiQun&MXP 发布时间：2020-03-17 18:49:57 ，浏览量：2

Java抽象类

Java接口

抽象类和接口使用区别：

activity 深度继承关系

Java抽象类

1、抽象类使用abstract修饰；2、抽象类不能实例化，即不能使用new关键字来实例化对象；3、含有抽象方法（使用abstract关键字

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Java抽象类 Java接口抽象类和接口使用区别： activity 深度继承关系

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Java抽象类 Java接口 抽象类和接口使用区别： activity 深度继承关系

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Java抽象类 Java接口抽象类和接口使用区别： activity 深度继承关系