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Java io Package

io refers to input / output.

Provides for system input and output through data streams, serialization and the file system. Unless otherwise noted, passing a null argument to a constructor or method in any class or interface in this package will cause a NullPointerException to be thrown.

Classes :

  1. File
  2. FileWriter
  3. FileReader
  4. BufferedWriter
  5. BufferedReader
  6. PrintWriter