Java PipedWriter.flush()

public void flush()  throws IOException

//from ww  w  . j  a  va  2  s .  c  om
import java.io.*;

public class Main {

   public static void main(String[] args) {

      PipedWriter writer = new PipedWriter();
      PipedReader reader = new PipedReader();

      try {
         // connect the reader and the writer
         writer.connect(reader);

         
         writer.write(70);
         writer.write(71);

         // flush the writer
         writer.flush();

         // print what we wrote
         for (int i = 0; i < 2; i++) {
            System.out.println((char) reader.read());
         }

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


   }
}