The getUsableSpace() method of a FileStore class is used to return the number of bytes available to this Java virtual machine on the file store. This method is useful to check free space. This method returns the available usable space as a long value.
Syntax:
public abstract long getUsableSpace()
throws IOException
Parameters: This method accepts nothing.
Return value: This method returns the available usable space as a long value.
Exception: This method throws IOException if an I/O error occurs.
Below programs illustrate the getUsableSpace() method:
Program 1:
// Java program to demonstrate// FileStore.getUsableSpace() method  import java.io.IOException;import java.nio.file.FileStore;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;  public class GFG {      public static void main(String[] args)    {        // create the object of Path        Path path            = Paths.get(                "E:\\Tutorials\\file.txt");          // get FileStore object        try {              FileStore fs                = Files.getFileStore(path);              // print FileStore name and Total usable space            System.out.println("FileStore Name: "                               + fs.name());            long bytes = fs.getUsableSpace();            long sizeInGB = bytes / (1024 * 1024);            System.out.println("Usable Space: "                               + sizeInGB + " MB");        }        catch (IOException e) {              // TODO Auto-generated catch block            e.printStackTrace();        }    }} |
Output:
Program 2:
// Java program to demonstrate// FileStore.getUsableSpace() method  import java.io.IOException;import java.nio.file.FileStore;import java.nio.file.Files;import java.nio.file.Path;import java.nio.file.Paths;  public class GFG {      public static void main(String[] args)    {        // create the object of Path        Path path            = Paths.get(                "C:\\Movies\\001.txt");          // get FileStore object        try {              FileStore fs                = Files.getFileStore(path);              // print FileStore name and Total usable space            System.out.println("FileStore Name: "                               + fs.name());            long bytes = fs.getUsableSpace();            long sizeInGB = bytes / (1024);            System.out.println("Usable Space: "                               + sizeInGB + " KB");        }        catch (IOException e) {              // TODO Auto-generated catch block            e.printStackTrace();        }    }} |
Output:
References: https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileStore.html#getUsableSpace()
