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Class java.io.Writer

java.lang.Object
|
   +----java.io.Writer

public abstract class Writer

extends Object

See Also:

Writer, BufferedWriter, CharArrayWriter, FilterWriter, OutputStreamWriter, FileWriter, PipedWriter, PrintWriter, StringWriter, Reader

lock

The object used to synchronize operations on this stream.

Writer()

Create a new character-stream writer whose critical sections will synchronize on the writer itself.

Writer(Object)

Create a new character-stream writer whose critical sections will synchronize on the given object.

close()

Close the stream, flushing it first.

flush()

Flush the stream.

write(char[])

Write an array of characters.

write(char[], int, int)

Write a portion of an array of characters.

write(int)

Write a single character.

write(String)

Write a string.

write(String, int, int)

Write a portion of a string.

protected Object lock

The object used to synchronize operations on this stream. For efficiency, a character-stream object may use an object other than itself to protect critical sections. A subclass should therefore use the object in this field rather than this or a synchronized method.

protected Writer()

Create a new character-stream writer whose critical sections will synchronize on the writer itself.

protected Writer(Object lock)

Create a new character-stream writer whose critical sections will synchronize on the given object.

public void write(int c) throws IOException

Write a single character. The character to be written is contained in the 16 low-order bits of the given integer value; the 16 high-order bits are ignored.

Subclasses that intend to support efficient single-character output should override this method.

Throws: IOException

If an I/O error occurs

public void write(char cbuf[]) throws IOException

Write an array of characters.

Parameters:

cbuf - Array of characters to be written

Throws: IOException

If an I/O error occurs

public abstract void write(char cbuf[],
                            int off,
                            int len) throws IOException

Write a portion of an array of characters.

Parameters:

cbuf - Array of characters

off - Offset from which to start writing characters

len - Number of characters to write

Throws: IOException

If an I/O error occurs

public void write(String str) throws IOException

Write a string.

Parameters:

str - String to be written

Throws: IOException

If an I/O error occurs

public void write(String str,
                   int off,
                   int len) throws IOException

Write a portion of a string.

Parameters:

str - A String

off - Offset from which to start writing characters

len - Number of characters to write

Throws: IOException

If an I/O error occurs

public abstract void flush() throws IOException

Flush the stream. If the stream has saved any characters from the various write() methods in a buffer, write them immediately to their intended destination. Then, if that destination is another character or byte stream, flush it. Thus one flush() invocation will flush all the buffers in a chain of Writers and OutputStreams.

Throws: IOException

If an I/O error occurs

public abstract void close() throws IOException

Close the stream, flushing it first. Once a stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously-closed stream, however, has no effect.

Throws: IOException

If an I/O error occurs

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