Question

In Java, I have a File object representing a folder:

String folderName = "/home/vektor/folder";
File folder = new File(folderName);

Now I want to create another File representing a file in this folder. I want to avoid doing a string concatenation like this:

String fileName = "test.txt";
File file = new File(folderName + "/" + fileName);

Because if I go deeper in creating this structure, I will come up with something like this:

File deepFile = new File(folderName + "/" + anotherFolderName + ... + "/" + fileName);

I would instead like to do something like

File betterFile = folder.createUnder(fileName);

Or even:

File otherFile = SomeFileUtils.createFileInFolder(folder, fileName);

Do you know of such solution?

Note: It’s quite OK to use “/” because Java will translate it to “\” for Windows, but it is not clean – I should use something like "file.separator" from System.getProperties().

Answer 1

Look at the Javadoc for File and you will see that the constructor takes a File object as parent.

Use the following form:

File deepFile = new File(folder, fileName);