通常向终端中输入命令时，无论是启动 GUI 应用程序还是仅启动终端应用程序，都可以使用命令行选项(options or switches or flags)（以下简称选项）来修改应用程序的运行方式。这是POSIX 规范设定的标准，因此能够检测和解析选项对 Java 程序员而言是很有用的技能。

From time to time, I find myself needing to handle command-line arguments in Java either for Java-based applications or for main() function implementations that provide a simple testing mechanism ...

There are numerous online examples that use Groovy‘s baked-in Apache Commons CLI based command-line parsing support. These examples include Groovy Command Line Options, Chris Mahns‘s Groovy Script: ...

Writing code to parse command line arguments is still necessary sometimes. When you need to examine command line arguments, see how and why you should use your open source Java toolkit and use Command ...