On this document we will be showing a java example on how to use the flush() method of BufferedInputStream Class. This method reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
A subclass must provide an implementation of this method.

Override by:

  • read in class FilterInputStream


  • IOException – if this input stream has been closed by invoking its close() method, or an I/O error occurs.

Method Syntax

public int read()
throws IOException

Method Argument

Data Type Parameter Description

Method Returns

This method returns the next byte of data, or -1 if the end of the stream is reached.


Requires Java 1.0 and up

Java BufferedInputStream read() Example

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



 * This example source code demonstrates the use of  
 * read() method of BufferedInputStream class

public class BufferedInputStreamReadExample {

	public static void main(String[] args) {		
		try {
			// initialize an input stream which in this case
			// we are intended to read a file thus 
			// FileInputStream object suits it best
			FileInputStream fis = new FileInputStream("C:javatutorialhq"
					+ "inputtest_file.txt");
			// initialize BufferedInputStream object
			BufferedInputStream bufferedStream = new BufferedInputStream(fis);
			// initialize variables
			int val; //character place holder
			String result=""; //result will accumulate on this variable
				// concatenate the characters read from the stream
				result = result+(char)val; // note the conversion of int to char
			// print the result read from the file
		} catch (FileNotFoundException e) {
			System.out.println("File does not exists");
		} catch (IOException e) {
			System.out.println("IOException occured");



Sample Output

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

java BufferedInputStream read() example output