Java File Processing

1
Java File Processing
2
The Basics

• File processing uses classes from java.io
• Java views a file as a sequential stream
• Bytes FileInputStream, FileOutputStream
• Unicode Characters FileReader, FileWriter

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A Step Further

• Class File retrieves information about files or
  directores
• Class Scanner used to input data from the
  keyboard
• Class Formatter used to format output

4
Even Further

• Serialized Object
• An object written to a file
• The object written contains type information
• Deserialized Object
• An object read from a file
• Type information used to reconstruct the object
• Classes ObjectInputStream, ObjectOutputStream
• These wrap normal i/o streams
• Objects that are written must implement class
  Serializable