不读取特定文件

Question

我的文件名为Invictus.txt，内容如下

Invictus
William Ernest Henley (1849–1903).

Out of the night that covers me,
Black as the pit from pole to pole,
I thank whatever gods may be
For my unconquerable soul.

In the fell clutch of circumstance
I have not winced nor cried aloud.
Under the bludgeonings of chance
My head is bloody, but unbowed.

Beyond this place of wrath and tears
Looms but the Horror of the shade,
And yet the menace of the years
Finds and shall find me unafraid.

It matters not how strait the gate,
How charged with punishments the scroll,
I am the master of my fate:
I am the captain of my soul

我正在使用

Scanner input = new Scanner(new File(fileName));

但

input.hasNext 

返回null，它可以与其他文件正常工作！！！

Answer 1

input.hasnext错误，请使用input.hasNext 。

公共布尔hasNext（）

如果此扫描程序的输入中包含另一个令牌，则返回true。 等待输入扫描时，此方法可能会阻塞。 扫描仪不会前进超过任何输入。

您的文件可能为empty 。 那就是为什么你得到null 。