Java Apache Commons IO Tutorial

In this Java Apache Commons IO Tutorial we learn how to use the Java Apache Commons IO library.

org.apache.commons.io.FileUtils class

• How to get Files in Directory based on Cutoff Time

• How to check a File is Symlink or Actual File

• How to get User Home Directory

• How to get System Temporary Directory

• How to create New Directory

• How to delete File

• How to delete Directory

• How to copy File to OutputStream

• How to create File from Directory and Name Elements

• How to check File Newer than a specified Date or File

• How to check File Older than a specified Date or File

• How to check Directory Contains a File or Directory

• How to get Readable File Size from Number of Bytes

• How to copy Content from URL to File

• How to copy List of Files to Directory

• How to copy InputStream to File

• How to copy a File to Directory

• How to copy a File

• How to copy Directory to Directory

• How to compare Contents of Files

• How to Delete All Files and Directories Inside a Directory

• How to compute Checksum of File

• How to get Readable File Size in KB MB GB TB

• How to get user directory

• How to get temporary directory

• How to construct File from Directory and Name Elements

• How to delete directory using FileUtils

org.apache.commons.io.IOUtils class

• How to convert CharSequence to InputStream

• How to read Content from URL into String

• How to read Content from URI into String

• How to read Content from URL into Byte Array

• How to read Content from URI into Byte Array

• How to convert String to InputStream

• How to convert Reader to Char Array

• How to convert Reader to Byte Array

• How to convert Reader to String

• How to convert InputStream to Char Array

• How to convert InputStream to String

• How to convert InputStream to Byte Array

• How to get the URL of Classpath Resource

• How to read Classpath Resource as String

• How to read Classpath Resource as Byte Array

• How to read List of Strings of Reader

• How to read List of Strings of InputStream

• How to read Reader Line by Line with LineIterator

• How to read InputStream Line by Line with LineIterator

• How to copy Large File Contents

• How to copy Reader to Writer

• How to copy Reader to OutputStream

• How to copy InputStream to Writer

• How to compare Contents of two Reader

• How to compare Contents of two InputStream

• How to convert Writer into BufferedWriter

• How to convert Reader into BufferedReader

• How to convert OutputStream into BufferedOutputStream

• How to convert InputStream into BufferedInputStream

• How to read text file content as a list of Strings

• How to use LineIterator to read file content

• How to copy file content from InputStream to OutputStream

• How to compare File Content of InputStream or Reader

• How to download website content from URL

• How to download website content from URI

• How to read text content from Reader

• How to read text content from InputStream

Happy Coding 😊