Java I/O Tutorial

Java comes with many handy I/O classes to support the input and output through bytes stream and file system. Here’s a list of the Java I/O examples including file, temporary file and directory manipulation, encoding, serialized and also compression with zip or Gzip.

Happy learning Java I/O :)

File

List of the File examples to show the use of Java I/O to create, read, write, modify file and get the file’s information.

• Create a file
• Construct file path
• Set the file permission
• Read file with BufferedInputStream
• Read file with BufferedReader
• Write file with FileOutputStream
• Write file with BufferedWriter
• Append content to file
• Delete a file
• Delete files with certain extension only
• Find files with certain extension only
• Rename a file
• Copy a file
• Move a file to another directory
• Get the file creation date
• Get the file last modified date
• Change the file last modified date
• Make a file read only
• Get file size
• Get the filepath of a file
• Get the total number of lines of a file
• Check if a file exists
• Check if a file is hidden
• Read UTF-8 encoded data from a file
• Write UTF-8 encoded data into a file
• Assign file content into a variable
• Generate a file checksum value
• Convert File into an array of bytes
• Convert array of bytes into File
• Convert String to InputStream
• Convert InputStream to String
• Convert File to Hex
• Get total of free disk space in your partition or volume

File Serialization

Take any object that implements the Serialization interface, convert it into bytes and store it into file; The file can be fully restore back to the original object later.

• Write an Object to file
• Read an Object from file

File Compression

File compression examples, ZIP and GZip.

• Compress files in ZIP format
• Decompress files from a ZIP file
• Compress a file in GZIP format
• Decompress file from GZIP file
• Compress serialized object into file
• Decompress serialized object from a Gzip file

Temporary File

List of the temporary file manipulation examples.

• Create a temporary file
• Write data to temporary file
• Delete temporary file
• Get the temporary file path

Directory

List of the directory manipulation examples.

• Create directory
• Delete directory
• Copy directory
• Traverse /List a directory structure
• Check if directory is empty
• Get the current working directory

Console IO

List of the Console IO examples.

• Get the standard input

Java I/O Reference

• Java I/O Documentation