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。
➤ Generics泛型, introduced in J2SE 5.0, is the long-awaited enhancement to the type system. J2SE 5.0中引入的，是对类型系统期待已久的增强。It allows a type or method to operate on objects of various types while providing compile-time type safety. 它允许类型或方法对各种类型的对象进行操作，同时提供编译时类型安全性。It adds compile-time type safety to the Collections Framework and eliminates the drudgery of casting. 它为集合框架增加了编译时类型安全性，并消除了强制转换的繁琐工作。
➤ Full-Screen Exclusive Mode API全屏独占模式API teaches you about a powerful feature of J2SE™ version 1.4 that allows the programmer to suspend the windowing system so that drawing can be done directly to the screen. 向您介绍J2SE™版本1.4的一个强大功能，允许程序员暂停窗口系统，以便可以直接在屏幕上绘制。Programmers writing games or other graphic-intensive applications should read this lesson. 编写游戏或其他图形密集型应用程序的程序员应阅读本课程。
➤ Preparation for Java Programmer Language CertificationJava程序员语言认证准备 provides information on training resources and lists the portions of the tutorial that cover potential exam topics.提供有关培训资源的信息，并列出本教程中涵盖潜在考试主题的部分。