Class FilterWriter

All Implemented Interfaces:
Closeable, Flushable, Appendable, AutoCloseable 

public abstract class FilterWriter
extends Writer

Abstract class for writing filtered character streams. The abstract class FilterWriter itself provides default methods that pass all requests to the contained stream. Subclasses of FilterWriter should override some of these methods and may also provide additional methods and fields.

Since:
JDK1.1

Fields

Modifier and Type Field and Description
protected Writer out

The underlying character-output stream.

Fields inherited from class java.io.Writer

lock

Constructors

Modifier Constructor and Description
protected FilterWriter(Writer out)

Create a new filtered writer.

Methods

Modifier and Type Method and Description
void close()

Closes the stream, flushing it first.
void flush()

Flushes the stream.
void write(char[] cbuf, int off, int len)

Writes a portion of an array of characters.
void write(int c)

Writes a single character.
void write(String str, int off, int len)

Writes a portion of a string.

Methods inherited from class java.io.Writer

append, append, append, write, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Fields

out

protected Writer out

The underlying character-output stream.

Constructors

FilterWriter

protected FilterWriter(Writer out)

Create a new filtered writer.

Parameters:
out - a Writer object to provide the underlying stream.
Throws:
NullPointerException - if out is null

Methods

write

public void write(int c)
           throws IOException

Writes a single character.

Overrides:
write in class Writer
Parameters:
c - int specifying a character to be written
Throws:
IOException - If an I/O error occurs

write

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

Writes a portion of an array of characters.

Specified by:
write in class Writer
Parameters:
cbuf - Buffer of characters to be written
off - Offset from which to start reading characters
len - Number of characters to be written
Throws:
IOException - If an I/O error occurs

write

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

Writes a portion of a string.

Overrides:
write in class Writer
Parameters:
str - String to be written
off - Offset from which to start reading characters
len - Number of characters to be written
Throws:
IOException - If an I/O error occurs

flush

public void flush()
           throws IOException

Flushes the stream.

Specified by:
flush in interface Flushable
Specified by:
flush in class Writer
Throws:
IOException - If an I/O error occurs

close

public void close()
           throws IOException

Description copied from class: Writer

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

Specified by:
close in interface Closeable
Specified by:
close in interface AutoCloseable
Specified by:
close in class Writer
Throws:
IOException - If an I/O error occurs

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/javase/8/docs/api/java/io/FilterWriter.html