Java interfaces are different from classes, and it’s important to know how to use their special properties in your Java programs. This tutorial introduces the difference between classes and interfaces ...

面向对象观念的建立 Java是面向对象的开发工具，使用java开发应用时，一定要懂面向对象编程的概念。在学过了java语法之后，应该建立OOP的概念。 理论学习阶段，首先应当理解class和object，了解class、interface、abstract class，理解OOP的继承性，封装性（public, protected ...