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.
protected Writer out
The underlying character-output stream.
protected FilterWriter(Writer out)
Create a new filtered writer.
out
- a Writer object to provide the underlying stream.NullPointerException
- if out
is null
public void write(int c) throws IOException
Writes a single character.
write
in class Writer
c
- int specifying a character to be writtenIOException
- If an I/O error occurspublic void write(char[] cbuf, int off, int len) throws IOException
Writes a portion of an array of characters.
write
in class Writer
cbuf
- Buffer of characters to be writtenoff
- Offset from which to start reading characterslen
- Number of characters to be writtenIOException
- If an I/O error occurspublic void write(String str, int off, int len) throws IOException
Writes a portion of a string.
write
in class Writer
str
- String to be writtenoff
- Offset from which to start reading characterslen
- Number of characters to be writtenIOException
- If an I/O error occurspublic void flush() throws IOException
Flushes the stream.
flush
in interface Flushable
flush
in class Writer
IOException
- If an I/O error occurspublic 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.
close
in interface Closeable
close
in interface AutoCloseable
close
in class Writer
IOException
- If an I/O error occurs
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