calculate the free disk space

To calculate available disk space using Java   

import java.io.IOException; 
  
import org.apache.commons.io.FileSystemUtils; 
  
public class DiskSpace { 
    public static void main(String[] args) { 
        try { 
  
            //calculate free disk space 
            double freeDiskSpace = FileSystemUtils.freeSpaceKb("C:");  
  
            //convert the number into gigabyte 
            double freeDiskSpaceGB = freeDiskSpace / 1024 / 1024; 
  
            System.out.println("Free Disk Space (GB):" + freeDiskSpaceGB); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
    } 
}