Lesson 14

This module discussed various subclasses of Readers and Writers that perform different functions to manipulate text data.

1. The FileReader and FileWriter classes read and write text files.
2. The BufferedReader and BufferedWriter classes increase performance by buffering I/O. The BufferedReader class also lets you read text line by line with readLine().
3. The LineNumberReader class is a subclass of BufferedReader that keeps track of which line it's reading.
4. The StringWriter, StringReader, CharArrayWriter, and CharArrayReader classes let you manipulate strings and character arrays with the familiar methods of Readers and Writers.
5. Finally, you learned how to write subclasses of FilterReader and FilterWriter that manipulate text before passing it on.

In the final, brief module, you'll review what you've learned in this course. You'll also find out how you can build on the skills you gained in this course and begin learning about network programming with Java. In addition, you'll be asked to complete a course evaluation.

Before you continue with the next module, take a moment to think about what you learned in this module. If you have any questions about using different types of readers and writers (such as PrintWriter, buffered readers and writers, string readers and writers, piped readers and writers, and so on), click the search button located at the top of the page.