今天我有一个a.jar的档案,里面main-class的名称叫做main
我们都知道,执行这个a.jar的 ..

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1) Yes, it is legal, so it's compiled and able to run. But it's considering not a good programming style!

2) A name of a class should indicate or encapsulate the primary function of the class. The name, main to me is not too significant. And it may create confusion for further maintainese.