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Find free disk space using Java
java.io.File class provides following useful methods to figure out the free disk space available.
| Sr.No. | Method & Description |
|---|---|
| 1 | public long getFreeSpace() Returns the number of unallocated bytes in the partition named by this abstract path name. |
| 2 | public long getTotalSpace() Returns the size of the partition named by this abstract pathname. |
| 3 | public long getUsableSpace() Returns the number of bytes available to this virtual machine on the partition named by this abstract pathname. |
Following example showcases the use of above methods.
Example Final
import java.io.File;
import java.text.NumberFormat;
public class Tester {
public static void main(String[] args) {
NumberFormat numberFormat = NumberFormat.getInstance();
numberFormat.setMaximumFractionDigits(2);
File cDrive = new File("C:\");
double freeSpace = cDrive.getFreeSpace();
double usableSpace = cDrive.getUsableSpace();
double totalSpace = cDrive.getTotalSpace();
double oneGB = 1024 * 1024 * 1024;
System.out.println("Free Space: " +
numberFormat.format(freeSpace/oneGB) + " GB");
System.out.println("Usable Space: " +
numberFormat.format(usableSpace/oneGB) + " GB");
System.out.println("Total Space: " +
numberFormat.format(totalSpace/oneGB) + " GB");
}
}Output
Free Space: 11.66 GB Usable Space: 11.66 GB Total Space: 97.56 GB
Updated on: 21-Jun-2020
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