What is FileUtils.sizeOfDirectoryAsBigInteger() in Java?
Overview
sizeOfDirectoryAsBigInteger() is a FileUtils class that is used to get the size of a directory recursively in bytes.
How to import FileUtils
The definition of FileUtils can be found in the Apache Commons IO package, which we can add to the Maven project by adding the following dependency to the pom.xml file:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.11.0</version>
</dependency>
For other versions of the
commons-iopackage, refer to the Maven Repository.
You can import the FileUtils class as follows:
import org.apache.commons.io.FileUtils;
Syntax
public static BigInteger sizeOfDirectoryAsBigInteger(final File directory)
Parameters
final File directory: This is the directory to get the size.
Return value
This method returns the size of the directory in bytes.
Code
import org.apache.commons.io.FileUtils;import java.io.File;public class Main{public static void main(String[] args){String filePath = "/Users/educative/Downloads";File file = new File(filePath);System.out.printf("The output of FileUtils.sizeOfDirectoryAsBigInteger(%s) is - %s", filePath,FileUtils.sizeOfDirectoryAsBigInteger(file));System.out.println();filePath = "1.txt";file = new File(filePath);System.out.printf("The output of FileUtils.sizeOfDirectoryAsBigInteger(%s) is - %s", filePath,FileUtils.sizeOfDirectoryAsBigInteger(file));}}
Example 1
- Directory file path:
"/Users/educative/Downloads"
The method returns the value 55464744799, indicating the size of the directory (supplied as the argument) in bytes.
Example 2
- Directory file path:
"1.txt"
The method throws an IllegalArgumentException, indicating that the file is not a directory.
Output
The output of the code will be as follows:
The output of FileUtils.sizeOfDirectoryAsBigInteger(/Users/educative/Downloads) is - 55464744799
Exception in thread "main" java.lang.IllegalArgumentException: Parameter 'directory' is not a directory: '1.txt'
at org.apache.commons.io.FileUtils.requireDirectory(FileUtils.java:2635)
at org.apache.commons.io.FileUtils.requireDirectoryExists(FileUtils.java:2651)
at org.apache.commons.io.FileUtils.sizeOfDirectoryAsBigInteger(FileUtils.java:2928)
at Main.main(Main.java:15)
