Java OutputStreamWriter.close()

public void close()  throws IOException

//from ww w .j av a2 s  .  com
import java.io.*;

public class Main {

   public static void main(String[] args) {

      try {
         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());

         // close the stream
         writer.close();
         os.close();
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}