Java IO Tutorial - Java OutputStreamWriter.flush()

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Syntax

OutputStreamWriter.flush() has the following syntax.

public void flush()  throws IOException

Example

In the following code shows how to use OutputStreamWriter.flush() method.

//from   w ww . j av a2  s . c o  m

import java.io.*;

public class Main {

   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
         writer.flush();
         // read what we write
         System.out.println((char) in.read());
         writer.close();
         os.close();

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

The code above generates the following result.

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