How to use getFreeSpace(), getTotalSpace() and getUsableSpace()?

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.

package com.nourit.javaIO;


public class GetSpaceExample {

  public static void main(String[] args) {
    File file = new File("D:/");
    System.out.println(file.getFreeSpace() / 1024 + " kilobytes ");
    System.out.println(file.getTotalSpace()/ 1024 + " kilobytes ");
    System.out.println(file.getUsableSpace()/1024+ " kilobytes ");


183695348 kilobytes 
233167868 kilobytes 
183695348 kilobytes



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