I'm making a basic file browser, and want to know how to get the default root directory. I know that java.io.File.listRoots() gives all the roots (for me it's A:\, C:\, D:\, E:\, F:\, G:\, H:\, I:\, L:\ T:\, U:\, X:\, Y:\, Z:\), but I want the one the user uses primarily (i.e. the one with the Operating system on it) so I know from where to start the browsing.
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2 Answers
Not sure if this is of any help, but you could try:
import javax.swing.filechooser.*;
FileSystemView.getFileSystemView().getRoots()[0];
or
FileSystemView.getFileSystemView().getHomeDirectory();
or
System.getProperty("user.dir");
For the last snippet, you could get the root directory by navigating upward using getParent() until null is returned.
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String userDir = new File(System.getProperty("user.dir")).getAbsolutePath(); String rootDir = userDir.substring(0, userDir.indexOf(File.separator)+1);– CaMiXCommented Mar 29, 2016 at 19:25 -
1Downvotes because
System.getProperty("user.dir");does not always return an OS drive path, rather the application's directory. Commented Sep 29, 2017 at 0:13 -
@BullyWiiPlaza is right. Perhaps that was meant to be
"user.home"?– Ky -Commented Sep 29, 2017 at 1:50
Getting the operating system root partition is only a thing on Windows since on Unix it's always /.
Hence, the following code works for Windows only:
System.getenv("SystemDrive");
It gets the SystemDrive environment variable value. This should always return the operating system's root partition e.g. C:.
answered Sep 29, 2017 at 0:15
