The class is the superclass of all classes that filter output streams. Following are the important points about FilterOutputStream −

  • The class itself simply overrides all methods of OutputStream with versions that pass all requests to the contained output stream.

  • The Subclasses of this class may further override some of these methods and may also provide additional methods and fields.

Class declaration

Following is the declaration for class −

public class FilterOutputStream
   extends OutputStream


Following are the fields for class −

  • protected OutputStream out − This is the output stream to be filtered.

Class constructors

Sr.No. Constructor & Description

FilterOutputStream(OutputStream out)

This creates an output stream filter built on top of the specified underlying output stream.

Class methods

Sr.No. Method & Description
1 void close()

This method closes this output stream and releases any system resources associated with the stream.

2 void flush()

This method flushes this output stream and forces any buffered output bytes to be written out to the stream.

3 void write(byte[] b)

This method writes b.length bytes to this output stream.

4 void write(byte[] b, int off, int len)

This method writes len bytes from the specified byte array starting at offset off to this output stream.

5 void write(int b)

This method writes the specified byte to this output stream.

Methods inherited

This class inherits methods from the following classes −