Basic HTML version of Foils prepared Sept 21 1998

Foil 33 Character Streams

From Java Tutorial 98- 4: Multi-Treading, Useful Java Classes, I/O and Networking NAVO Tutorial -- Sept 23 1998. by Geoffrey C. Fox, Nancy McCracken
Reader/Writer classes for Foil 33
Java 1.1 introduced Reader and Writer classes for character streams, which are used to read/write text files.
To construct a character output stream, for example:
  • PrintWriter out =
  • new PrintWriter(
  • new OutputStreamWriter(
  • new FileOutputStream( filename ) ) );
The OutputStreamWriter constructor takes a byte stream and converts it to a character stream. As a shortcut, use
  • PrintWriter out =
  • new PrintWriter(
  • new FileWriter( filename ) );
  • where FileWriter is a subclass of OutputStreamWriter.

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