.ru文件扩展名，.ru文件如何打开？

.ru

文件类型：JavaSoft JRE 1.3 Library

扩展名为.ru的文件是一个开发文件。

文件说明：

Java library used by the Java Runtime Environment; includes functions and objects used for creating Java programs; JavaSoft is a division of Sun Microsystems.ru                                                                      

打开.ru文件

Mac OS

Java 1.3 Runtime Environment or later　

Windows

Java 1.3 Runtime Environment or later　

Linux

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来源：. ru文件