public class FilterOutputStream extends OutputStream
The class FilterOutputStream itself simply overrides all methods of OutputStream with versions that pass all requests to the underlying output stream. Subclasses of FilterOutputStream may further override some of these methods as well as provide additional methods and fields.
| Modifier and Type | Field and Description |
|---|---|
protected OutputStream |
out
The underlying output stream to be filtered.
|
| Constructor and Description |
|---|
FilterOutputStream(OutputStream
Creates an output stream filter built on top of the specified underlying output stream.
|
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Closes this output stream and releases any system resources associated with the stream.
|
void |
flush()
Flushes this output stream and forces any buffered output bytes to be written out to the stream.
|
void |
write(byte[] b)
Writes
b.length bytes to this output stream.
|
void |
write(byte[] b, int off, int len)
Writes
len bytes from the specified
byte array starting at offset
off to this output stream.
|
void |
write(int b)
Writes the specified
byte to this output stream.
|
protected OutputStreamout
public FilterOutputStream(OutputStreamout)
out - the underlying output stream to be assigned to the field
this.out for later use, or
null if this instance is to be created without an underlying stream.
public void write(int b)
throws IOException
byte to this output stream.
The write method of FilterOutputStream calls the write method of its underlying output stream, that is, it performs out.write(b).
Implements the abstract write method of OutputStream.
write in class
OutputStream
b - the
byte.
IOException - if an I/O error occurs.
public void write(byte[] b)
throws IOException
b.length bytes to this output stream.
The write method of FilterOutputStream calls its write method of three arguments with the arguments b, 0, and b.length.
Note that this method does not call the one-argument write method of its underlying stream with the single argument b.
write in class
OutputStream
b - the data to be written.
IOException - if an I/O error occurs.
write(byte[], int, int)
public void write(byte[] b,
int off,
int len)
throws IOException
len bytes from the specified
byte array starting at offset
off to this output stream.
The write method of FilterOutputStream calls the write method of one argument on each byte to output.
Note that this method does not call the write method of its underlying input stream with the same arguments. Subclasses of FilterOutputStream should provide a more efficient implementation of this method.
write in class
OutputStream
b - the data.
off - the start offset in the data.
len - the number of bytes to write.
IOException - if an I/O error occurs.
write(int)
public void flush()
throws IOException
The flush method of FilterOutputStream calls the flush method of its underlying output stream.
flush in interface
Flushable
flush in class
OutputStream
IOException - if an I/O error occurs.
out
public void close()
throws IOException
The close method of FilterOutputStream calls its flush method, and then calls the close method of its underlying output stream.
close in interface
Closeable
close in interface
AutoCloseable
close in class
OutputStream
IOException - if an I/O error occurs.
flush(),
out