The getFreeSpaceKb(String path) method call of the FileSystemUtils class can help you to calculate the free space of a drive or volume in kilo bytes.

Beside using commons io solution, you can use the File.getFreeSpace() method call provided in the Java 1.6 API. You can find an example of it in the following link: How do I get total space and free space of my disk?.

package org.kodejava.example.commons.io;

import org.apache.commons.io.FileSystemUtils;
import org.apache.commons.io.FileUtils;

import java.io.IOException;

public class DiskFreeSpace {
    public static void main(String[] args) {
        try {
            String path = "C:";
            long freeSpaceKB = FileSystemUtils.freeSpaceKb(path);
            long freeSpaceMB = freeSpaceKB / FileUtils.ONE_KB;
            long freeSpaceGB = freeSpaceKB / FileUtils.ONE_MB;

            System.out.println("Size of " + path + " = " + freeSpaceKB + " KB");
            System.out.println("Size of " + path + " = " + freeSpaceMB + " MB");
            System.out.println("Size of " + path + " = " + freeSpaceGB + " GB");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

An example result of the code above is:

Free space of C: = 121961228 KB
Free space of C: = 119102 MB
Free space of C: = 116 GB

• About
• Latest Posts

Wayan

Programmer, runner, recreational diver, live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA.

Latest posts by Wayan (see all)

• How do I write JSON string using JSON-Java (org.json) library? - August 31, 2018
• How do I read JSON file using JSON-Java (org.json) library? - August 31, 2018
• Install IntelliJ IDEA Community Edition and Write Hello Kotlin Program - May 13, 2018