Calculate Free Disk Space in Java

How to calculate Free Disk Space in Java using Apache Commons IO

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();
        }
    }
}