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This
class is a character output stream that uses an internal character
array as the destination of characters written to it. When you create
a CharArrayWriter, you may optionally specify an
initial size for the character array, but you do not specify the
character array itself; this array is managed internally by the
CharArrayWriter and grows as necessary to
accommodate all the characters written to it. The toString(
)
and toCharArray( ) methods return a copy of all
characters written to the stream, as a string and an array of
characters, respectively. CharArrayWriter defines
the standard write( )
,
flush( ), and close( ) methods
all Writer subclasses define. It also defines a
few other useful methods. size(
)
returns the number of characters that
have been written to the stream. reset( ) resets
the stream to its initial state, with an empty character array; this
is more efficient than creating a new
CharArrayWriter. Finally, writeTo(
) writes the contents of the
internal character array to some other specified character stream.
CharArrayWriter is the character-stream analog of
ByteArrayOutputStream and is quite similar to
StringWriter.
Figure 9-8. java.io.CharArrayWriter
public class CharArrayWriter extends Writer {
// Public Constructors
public CharArrayWriter ( );
public CharArrayWriter (int initialSize );
// Public Instance Methods
5.0 public CharArrayWriter append (CharSequence csq );
5.0 public CharArrayWriter append (char c );
5.0 public CharArrayWriter append (CharSequence csq , int start , int end );
public void reset ( );
public int size ( );
public char[ ] toCharArray ( );
public void writeTo (Writer out ) throws IOException;
// Public Methods Overriding Writer
public void close ( ); empty
public void flush ( ); empty
public void write (int c );
public void write (char[ ] c , int off , int len );
public void write (String str , int off , int len );
// Public Methods Overriding Object
public String toString ( );
// Protected Instance Fields
protected char[ ] buf ;
protected int count ;
}