On this document we will be showing a java example on how to use the flush() method of BufferedOutputStream Class. This method flushes this buffered output stream. This forces any buffered output bytes to be written out to the underlying output stream.

Specified by:

  • flush in interface Flushable

Override by:

  • flush in class FilterOutputStream


  • IOException – If an I/O error occurs

Method Syntax

public void flush()
throws IOException

Method Argument

Data Type Parameter Description

Method Returns

This method returns void.


Requires Java 1.0 and up

Java BufferedOutputStream flush() Example

Below is a java code demonstrates the use of flush() method of BufferedOutputStream class. The example presented might be simple however it shows the behaviour of the flush().

Sample Output

Below is the sample output when you run the above example.

java BufferedOutputStream flush() example output