AI-generated Key Takeaways
-
FilterWriter
is an abstract class for writing filtered character streams, extending theWriter
class. -
It provides default methods that pass requests to the contained stream, allowing subclasses to override for custom filtering.
-
Subclasses can extend
FilterWriter
by overriding methods likeclose
,flush
, andwrite
to modify stream behavior. -
A
FilterWriter
is constructed with an underlyingWriter
object to which it delegates operations. -
FilterWriter
includes methods for closing the stream, flushing the stream, and writing characters, strings, and character arrays.
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.
Field Summary
protected Writer | out | The underlying character-output stream. |
Inherited Field Summary
Protected Constructor Summary
Public Method Summary
void |
close()
Closes the stream, flushing it first.
|
void |
flush()
Flushes the stream.
|
void |
write(int c)
Writes a single character.
|
void | |
void |
write(char[] cbuf, int off, int len)
Writes a portion of an array of characters.
|
Inherited Method Summary
Fields
Protected Constructors
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
|
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Public Methods
public void close ()
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.
Throws
IOException |
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public void write (int c)
Writes a single character.
Parameters
c | int specifying a character to be written |
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Throws
IOException | If an I/O error occurs |
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public void write (String str, int off, int len)
Writes a portion of a string.
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 |
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public void write (char[] cbuf, int off, int len)
Writes a portion of an array of characters.
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 |
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