Java tutorial
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(); } } }