Java check if file exists directory

To work with the Files class, you need to be acquainted with the Path class. Files only accepts Path , and not File objects. For the purposes of the tutorial, we'll define a File and Path instance for the file.

That being said, the first way we can check if a file exists is through the Files class:. If exists returns true , that means that notExists should return false. B , right? Well, that's where many get it wrong. If Files. It can also mean that the file's existence cannot be verified. In that case, both Files. This typically happens if you have a file that's locked in a way that Java can't access it.

Imagine we had a file that's locked in our directory - lockedFile. It exists, obviously, but Java doesn't have permission to confirm that on our system - thus giving conflicting results. Additionally, we can check if the file is a regular file false if it's a directory through the isRegularFile method:. Instead of using the Files class, we can also perform methods on the file objects themselves:. Check out our hands-on, practical guide to learning Git, with best-practices, industry-accepted standards, and included cheat sheet.

Stop Googling Git commands and actually learn it! The difference between these two is that the first one checks if it's a file, and the other one checks if it exists.

In different circumstances, they'd return different results. A fun thing to note is that if you're using a File to check for existence, Java can determine if the locked file from before exists or not:. With this, it's evident that the locked file can be read by using the File class instead of the Files helper class. Directories are essentially files, that can contain other files. This is why checking if a directory is a file will return true.

Though, if you're checking if a directory is a directory a special type of file , you'll get a more accurate result. Note: If the directory doesn't exist , the isDirectory method will return false.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 9 years, 6 months ago. Active 3 years, 2 months ago. Viewed k times. MOD" return Constants.

I don't understand why, can anybody find any bug here? And if so, which env is this windows or linux in linux files are case sensitive It is windows OS, but the file parameter and the actual name of the file in the directory are case-sensitively same.

Add a comment. Active Oldest Votes. This is where you have the bug. Akhi Akhi 2, 16 16 silver badges 24 24 bronze badges. I had 2 methods to check the same function because none were working.

Now I can safely remove the whole for loop. Thanks again. Try this Anyways I got the answer and accepted it too. Thanks — gkris.

Well that what i mean in path Then simply give the path of the file that is needed — Kumar Vivek Mitra.