在这个过程中，它可以添加用户定义的属性，找到主类名。
During which it adds user defined properties, and finds the main class name.
第一个参数是应用程序的名称，第三个参数是应用程序主类的完全限定类名。
The first parameter is the name of the application, and the third is the fully qualified class name of the application's main class.
最后一个参数是您的应用程序的主类的完全限定类名。
The final argument is the fully qualified class name of what will be your application's main class.
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