Java IO Tutorial (with Examples)

Java IO is a collection of classes and interfaces which you may use to perform almost every possible IO operation through your java application. This java IO tutorial lists down examples of IO operations on various scenarios for quick reference.

Java IO Basics

• How Java I/O Works Internally at Lower Level?
• Difference between standard IO and NIO
• Automatic resource management with try-with-resources

Directory Operations

• How to copy directories
• Delete a directory with all files inside it

File Operations

• How to create a new file
• How to read file
• How to write to file
• How to check if file exists
• Read file line by line in java 8
• Read file line by line using LineNumberReader
• How to make a file read only
• 4 ways to copy files
• How to find/delete files of certain extension
• FileFilter Example

Temporary File Operations

• Create a temporary file
• Write data to temporary file
• How to delete temporary file

Convert from X to Y

• Convert String to InputStream
• How to read file content into byte array
• How to read data from InputStream into String

Miscellaneous Uses

• How to read input from console
• Create Password Protected Zip Files
• Manage system log files not to exceed N GB in linux
• How to generate SHA or MD5 file checksum hash
• How to do deep cloning using in memory serialization
• Load/Read/Write Properties file examples
• How to Read Write UTF-8 Encoded Data
• Base64 encoding and decoding example in java 8

Happy Learning !!