TextIO.java定义一个类包含一些静态方法做输入/输出。这些方法可以更容易地使用标准输入流和输出流，System.in和System.out。 textio程序还支持其他输入源和输出目的地，如文件。需要注意的是这个版本的的textio需要Java 5.0（或更高版本）。,TextIO.java defines a class containing some static methods for doing input/output. These methods make it easier to use the standard input and output streams, System.in and System.out. TextIO also supports other input sources and output destinations, such as files. Note that this version of TextIO requires Java 5.0 (or higher). The TextIO class defined by this file is only useful in a command-line environment, and it might be inconvenient to use in integrated development environments such as Eclipse in which standard input does not work particularly well.