FileStore getUnallocatedSpace() method in Java with Examples
Last Updated :
12 Dec, 2021
The getUnallocatedSpace() method of a FileStore class is used to get the number of unallocated bytes in the file store. This method is useful to check free space. This method returns the available unallocated space as a long value.
Syntax:
public abstract long getUnallocatedSpace()
throws IOException
Parameters: This method accepts nothing.
Return value: This method returns the available unallocated space as a long value.
Exception: This method throws IOException if an I/O error occurs.
Below programs illustrate the getUnallocatedSpace() method:
Program 1:
Java
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)
{
Path path
= Paths.get(
"E:\\Tutorials\\file.txt");
try {
FileStore fs
= Files.getFileStore(path);
System.out.println("FileStore Name: "
+ fs.name());
long bytes = fs.getUnallocatedSpace();
long sizeInGB = bytes / ( 1024 * 1024 * 1024 );
System.out.println("Free Space : "
+ sizeInGB + "GB");
}
catch (IOException e) {
e.printStackTrace();
}
}
}
|
Output:
Program 2:
Java
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)
{
Path path
= Paths.get(
"C:\\Movies\&# 092 ;&# 048 ; 01 .txt");
try {
FileStore fs
= Files.getFileStore(path);
System.out.println("FileStore Name: "
+ fs.name());
System.out.println("Free Space in bytes: "
+ fs.getUnallocatedSpace());
}
catch (IOException e) {
e.printStackTrace();
}
}
}
|
Output:
References: https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileStore.html#getUnallocatedSpace()
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