Java OutputStreamWriter.flush()

public void flush()  throws IOException

/*  w ww . j a  v a  2s.  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();
      }
   }
}