Get Disk Free Space

This is an example of how to get the Disk free space in Java. We are using the class that provides static utility methods for general file system functions not provided via the JDK File class. Getting the free space of a Disk implies that you should:

  • Use freeSpaceKb(String path) that returns the free space on a drive or volume in kilobytes by invoking the command line.
  • Convert the KB to GB, by diving the result of KB with the, that is the number of bytes in a megabyte.

Let’s take a look at the code snippet that follows:  

package com.javacodegeeks.snippets.core;
public class GetFreeDiskSpace {
	public static void main(String[] args) {
		try {			
			// Set a string with the path

String path = "C:";

// Get free space in KB

long freeSpaceInKB = FileSystemUtils.freeSpaceKb(path);

// Calculate free space in GB

long freeSpaceInGB = freeSpaceInKB / FileUtils.ONE_MB;
// Print the result

System.out.println("Free space of " + path + " drive = " + freeSpaceInGB + " GB");

  } catch (IOException e) {




Free space of C: drive = 40 GB

This was an example of how to get the Disk free space in Java.

Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.
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