说明： JAVA程序员必读，本JAVA教程将讨论JAVA编程语言的基础知识。其中内容涉及以下几个方面：
1.面向对象编程概念
2.语言基础
3.对象和简单数据对象
4.类和继承
5.接口和包
6.编程中的一些共同的问题 (Java programmers required reading, the guide will discuss the Java programming language Java in the knowledge base. Its contents will cover the following areas : 1. Object-oriented programming concepts 2. Three basic language. Objects and simple data object 4. Category 5 and inheritance. Interface and six packets. Programming some common problems)
