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。
The Date-Time package, java.time, introduced in the Java SE 8 release, provides a comprehensive model for date and time and was developed under JSR 310: Date and Time API.JavaSE8发行版中引入的日期时间包java.time提供了日期和时间的综合模型，是根据JSR 310: Date and Time API开发的。Although java.time is based on the International Organization for Standardization (ISO) calendar system, commonly used global calendars are also supported.虽然java.time基于国际标准化组织（ISO）日历系统，但也支持常用的全局日历。
This trail covers the fundamentals of using the ISO-based classes to represent date and time and to manipulate date and time values.本教程介绍了使用基于ISO的类表示日期和时间以及操作日期和时间值的基础知识。