Things you can mark as static:
■ Methods
■ Variables
■ A class nested within another class, but not within a method .
■ Initialization blocks
Things you can't mark as static:
■ Constructors (makes no sense; a constructor is used only to create instances)
■ Classes (unless they are nested)
■ Interfaces
■ Method local inner classes
■ Inner class methods and instance variables
■ Local variables
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/7899089/viewspace-623531/ ，如需转载，请注明出处，否则将追究法律责任。
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