接口类和抽象类有什么区别
总感觉他们两是一个东西又不是一个东西，有种混乱的感觉。
回复讨论(解决方案)
抽象类
规定了一系列的方法，并规定了必须由继承类实现的方法。由于有抽象方法的存在，所以抽象类不能实例化
可以将抽象类理解为毛坯房，门窗、墙面的样式由你自己来定
所以抽象类与作为基类的普通类的区别在于约束性更强
接口类
与抽象类很相似，表现在接口中定义的方法，必须由引用类实现
但他与抽象类的根本区别在于用途：与不同个体间沟通的规则（方法）
你要进宿舍需要有钥匙，这个钥匙就是你与宿舍的接口
你的同室也有这个接口，所以他也能进入宿舍
你用手机通话，那么手机就是你与他人交流的接口
1. 接口是抽象类的变体，接口中所有的方法都是抽象的。而抽象类中可以有非抽象方法。抽象类是声明方法的存在而不去实现它的类。
2. 接口可以继承，抽象类不行。
3.接口定义方法，没有实现的代码，而抽象类可以实现部分方法。
4.接口中基本数据类型为static 而抽类象不是。
5.接口可以继承，抽象类不行。
6.可以在一个类中同时实现多个接口。
7.接口的使用方式通过implements关键字进行，抽象类则是通过继承extends关键字进行
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