Java"new File()"；不创建文件 [英] Java "new File()" does not create file

问题描述

这将是一个非常愚蠢的问题，但我似乎无法在Java中创建新文件来挽救生命.

This will be a really dumb question, but i can't seem to create a new file in java to save my life.

它总是抛出

java.io.FileNotFoundException:用户/用户名/Documents/testProject/test.txt(无此类文件或目录)

java.io.FileNotFoundException: Users/username/Documents/testProject/test.txt (No such file or directory)

我尝试过这样:

File newFile = new File("Users/username/Documents/testProject/test.txt");

并尝试了此操作:

File newFile = new File("/Users/username/Documents/testProject/test.txt");

我在做什么错了?

显然问题不存在.抱歉，我稍后尝试在代码中读取一个空文件.

apparently the issue wasn't there. I was trying to read from an empty file later on in the code, sorry folks.

推荐答案

new File("...")不会创建新文件.它将创建一个包含文件名的新对象(在内存中).然后，您可以对其执行 exists()， canRead()和 isDirectory()之类的操作，并且可以调用 createNewFile()从中创建实际文件.

new File("...") does not create a new file. It creates a new object (in memory) containing a filename. You can then perform operations like exists(), canRead() and isDirectory() on it, and you can invoke createNewFile() to create an actual file out of it.

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