java.io.BufferedOutputStream flush()
Description
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
Throws:
- IOException – If an I/O error occurs
Method Syntax
public void flush()
throws IOException
Method Argument
Data Type | Parameter | Description |
---|---|---|
N/A | N/A | N/A |
Method Returns
This method returns void.
Compatibility
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().
package com.javatutorialhq.java.examples; import java.io.BufferedOutputStream; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStreamWriter; import java.util.Scanner; /* * This example source code demonstrates the use of * flush() method of BufferedOutputStream class */ public class BufferedOutputStreamFlushExample { public static void main(String[] args) { try { // initialize File object File f = new File("C:javatutorialhqoutputtest_out.txt"); // instantiate a new FileOutputStream FileOutputStream fos = new FileOutputStream(f); // using the above FileOutputStream // instantiate a BufferedOutputStream object BufferedOutputStream buffOut = new BufferedOutputStream(fos); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(buffOut)); bw.write("This is a test string"); // flush and close the BufferedWriter bw.flush(); bw.close(); // flush and close the BufferedOutputStream buffOut.flush(); buffOut.close(); // flush and close the FileOutputStream fos.flush(); fos.close(); // read the contents of the file Scanner s = new Scanner(f); while(s.hasNextLine()){ System.out.println(s.nextLine()); } s.close(); } catch (FileNotFoundException e) { System.out.println("File path not found"); } catch (IOException e) { System.out.println("IOException occured"); } } }