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。
Programming I/O often involves translating to and from the neatly formatted data humans like to work with. 编程I/O通常涉及到与人类喜欢使用的格式整洁的数据之间的转换。To assist you with these chores, the Java platform provides two APIs. 为了帮助您完成这些琐事，Java平台提供了两个API。The scanner API breaks input into individual tokens associated with bits of data. 扫描器API将输入分解为与数据位关联的单个标记。The formatting API assembles data into nicely formatted, human-readable form.格式化API将数据组装成格式良好、可读的形式。