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FileStore getBlockSize() method in Java with Examples
  • Last Updated : 03 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 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 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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