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The following examples provide the commonly used functions Java I/O provides. They have been fully tested and can be used directly.

  • I/O Class Hierarchy Diagram
  • Create file/directory
  • Delete file
  • Read file line by line
  • Write to file
  • Append to file
  • Copy file
  • Merge files into one file
  • Move file
  • Merge two directories
  • Loop through directory
  • Sort content in file
  • Download Image from URL in Java
  • Unzip a jar file
  • FileOutputStream vs FileWriter
  • When to close FileWriter?
  • Convert file to string
  • Convert file to char array
  • Transfer content from one file to another
  • Java: convert a file to a byte array, then convert byte array to a file.
  • Java: convert image to byte array, convert byte array to image

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