FileStore getBlockSize() method in Java with Examples

Last Updated : 3 Dec, 2019
The getBlockSize() method of a FileStore class is used to return the number of bytes per block in this file store Object. Every File storage is organized into discrete sequences of bytes called blocks and a block is the smallest storage unit of a file store. Every read and write operation is performed on multiple blocks. This method is helpful in getting the size of Block. Syntax: 
public long getBlockSize() throws IOException
Parameters: This method accepts nothing. Return value: This method returns a positive value representing the block size of this file store, in bytes. Exception: This method throws following Exceptions:
  • IOException: if an I/O error occurs.
  • UnsupportedOperationException: if the operation is not supported.
Below programs illustrate the getBlockSize() method: Program 1: Java 
// Java program to demonstrate
// FileStore.getBlockSize() 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)
        throws IOException
    {
        // create object of Path
        Path path
            = Paths.get(
                "C:\\Movies\\001.txt");

        // get FileStore object

        FileStore fs
            = Files.getFileStore(path);

        // print FileStore name and
        // getBlockSize
        System.out.println("FileStore Name: "
                           + fs.name());

        System.out.println("Block Size:"
                           + fs.getBlockSize());
    }
}
Output: Program 2: Java 
// Java program to demonstrate
// FileStore.getBlockSize() 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)
        throws IOException
    {
        // create object of Path
        Path path
            = Paths.get(
                "E:\\Tutorials\\file.txt");

        // get FileStore object

        FileStore fs
            = Files.getFileStore(path);

        // print FileStore name and
        // getBlockSize
        System.out.println("FileStore Name: "
                           + fs.name());

        System.out.println("Block Size:"
                           + fs.getBlockSize());
    }
}
Output: References: https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileStore.html#getBlockSize()
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