java File类的问题？

[lian2002]

比如我用File类对象进行了delete()操作删除了一个文件，然后怎样刷新目录？

[snowredfox]

Deletes the file or directory denoted by this abstract pathname. If this pathname denotes a directory, then the directory must be empty in order to be deleted.
Returns:
true if and only if the file or directory is successfully deleted; false otherwise

删除了就删除了贝,为啥还要刷新,刷新是系统的事情啦

[GJA106]

好象没有刷新目录的API。