Java.io.OutputStreamWriter.flush() Method

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Description

The java.io.OutputStreamWriter.flush() method flushes the stream.

Declaration

Following is the declaration for java.io.OutputStreamWriter.flush() method.

public void flush()

Parameters

NA

Return Value

This method does not return a value.

Exception

IOException − If an I/O error occurs.

Example

The following example shows the usage of java.io.OutputStreamWriter.flush() method.

package com.tutorialspoint;

import java.io.*;

public class OutputStreamWriterDemo {
   public static void main(String[] args) {
      try {
         // create a new OutputStreamWriter
         OutputStream os = new FileOutputStream("test.txt");
         OutputStreamWriter writer = new OutputStreamWriter(os);

         // create a new FileInputStream to read what we write
         FileInputStream in = new FileInputStream("test.txt");

         // write something in the file
         writer.write(70);

         // flush the stream
         System.out.println("Flushing Stream...");
         writer.flush();
         System.out.println("Stream flushed.");

         // read what we write
         System.out.println("" + (char) in.read());

      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Flushing Stream...
Stream flushed.
F