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。
This lesson explains how to format numbers, currencies, dates, times, and text messages. 本课介绍如何设置数字、货币、日期、时间和短信的格式。Because end users can see these data elements, their format must conform to various cultural conventions. 因为最终用户可以看到这些数据元素，所以它们的格式必须符合各种文化习俗。Following the examples in this lesson will teach you how to:以下是本课程中的示例，将教您如何：
This section explains how to use the 本节介绍如何使用NumberFormat, DecimalFormat, and DecimalFormatSymbols classes.NumberFormat、DecimalFormat和DecimalFormatSymbols类。
This section focuses on the 本节重点介绍DateFormat, SimpleDateFormat, and DateFormatSymbols classes.DateFormat、SimpleDateFormat和DateFormatSymbols类。
This section shows how the 本节介绍MessageFormat and ChoiceFormat classes can help you solve some of the problems you might encounter when formatting text messages.MessageFormat和ChoiceFormat类如何帮助您解决格式化文本消息时可能遇到的一些问题。