The Java Tutorials have been written for JDK 8.Java教程是为JDK 8编写的。Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.本页中描述的示例和实践没有利用后续版本中引入的改进，并且可能使用不再可用的技术。See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.有关Java SE 9及其后续版本中更新的语言特性的摘要，请参阅Java语言更改。
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.有关所有JDK版本的新功能、增强功能以及已删除或不推荐的选项的信息，请参阅JDK发行说明。
Talk about Java technology seems to be everywhere, but what exactly is it?到处都在谈论Java技术，但到底是什么呢？The following sections explain how Java technology is both a programming language and a platform, and provide an overview of what this technology can do for you.以下各节将解释Java技术如何既是一种编程语言又是一种平台，并概述该技术可以为您做些什么。