///////    UnicodeIO.java    ///////
import java.io.*;

class UnicodeIO
{    public static void main(String[] args)
              throws IOException
     {   char pi = '\u03C0';
         FileOutputStream f = new FileOutputStream("datafile");
         OutputStreamWriter out = new OutputStreamWriter(f, "Unicode");
         out.write((int) pi);
         out.close();
         FileInputStream g = new FileInputStream("datafile");
         InputStreamReader in = new InputStreamReader(g, "Unicode");
         int b1 = in.read();
         if ( pi == (char) b1 )
              System.out.println("Writen and read pi.");
     }
}