Get free space, total space, usable space

long getFreeSpace()

Returns the number of unallocated bytes in the partition named by this abstract path name.

long getTotalSpace()

Returns the size of the partition named by this abstract pathname.

long getUsableSpace()

Returns the number of bytes available to this virtual machine on the partition named by this abstract pathname.

import java.io.File;

public class Main {

  public static void main(String[] args) {
    File aFile = new File("c:/");
    System.out.println(aFile.getFreeSpace());
    System.out.println(aFile.getTotalSpace());
    System.out.println(aFile.getUsableSpace());
  }
}

The output:

12283260928
79990812672
12283260928

1. File
2. Constants from File class
3. Create file object
4. Is it executable, readable or writable
5. Compare two file path
6. Create a file
7. Delete a file
8. Is it a file or a directory
9. Whether the file or directory denoted by this abstract pathname exists
10. Whether this abstract pathname is absolute
11. Is this file hidden
12. Get the file last modified time
13. Get the file size
14. Get file path and name
15. Get free space, total space, usable space
16. Get parent file
17. Return file in a directory
18. The file system roots
19. Create new directories
20. Rename file
21. Change to executable, readable, writable
22. Change last-modified time
23. Get string representation of a file location
24. Convert file location to URI and URL