Java有两方面的含义：Java语言、Java平台

作为一种语言，Java是一种跨平台开发语言，能开发出跨平台的应用对象和应用程序

Java语言具有以下特点：简单、 跨平台、面向对象、健壮性、安全、解释执行、可移植性、多线程机制、动态性等。

作为一种平台，Java平台包括两部分内容：Java虚拟机和Java API。

-Java has two meanings: Java language, Java Platform

As a language, Java is a cross-platform development language, be able to develop cross-platform application objects and applications

       　Java language has the following characteristics: simple, cross-platform, object-oriented, robustness, security, interpreted, portability, multithreading, dynamic and so on.

As a platform, Java platform consists of two parts: Java Virtual Machine and Java API.