这是什么错误，我在G盘中已经建立了ul.txt文件

Answer 1

根据java api如果name是一个路径而不是文件或者文件不能打开或抛出FileNotFoundException,应该把G:\\ul改成G:\\ul.txt

Answer 2

在代码里把文件的后缀名也加上，比如ui.txt

Answer 3

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https://www.imooc.com/wenda/detail/363064

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https://www.imooc.com/wenda/detail/357004

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https://www.imooc.com/wenda/detail/389285

https://www.imooc.com/wenda/detail/388923

https://www.imooc.com/wenda/detail/386956

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https://www.imooc.com/wenda/detail/344251

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Answer 4

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https://www.imooc.com/wenda/detail/354319

https://www.imooc.com/wenda/detail/355069

https://www.imooc.com/wenda/detail/340767

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https://www.imooc.com/wenda/detail/333453

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https://www.imooc.com/wenda/detail/352130

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https://www.imooc.com/wenda/detail/340867

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Answer 5

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https://www.imooc.com/wenda/detail/340380

Answer 6

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Answer 7

改了也没用