Sun Certification Training Guide (310-025, 310-027): Java™ 2 Programmer and Developer Exams

Character Array and String I/O

The CharArrayReader and CharArrayWriter classes are similar to the ByteArrayInputStream and ByteArrayOutputStream classes in that they support I/O from memory buffers. The difference between these classes is that CharArrayReader and CharArrayWriter support 16-bit character I/O, and ByteArrayInputStream and ByteArrayOutputStream support 8-bit byte array I/O.

The CharArrayReader class does not add new methods to those that Reader provides. The CharArrayWriter class adds the following methods to those provided by Writer:

• reset()— Resets the buffer so that it can be read

• size()— Returns the current size of the buffer

• toCharArray()— Returns a character array copy of the output buffer

• toString()— Copies and converts ...