Java tutorial
import java.io.*; public class Main { public static void main(String[] args) { try { byte[] b1 = { 15, 8 }; RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw"); raf.writeByte(b1[0]); raf.seek(0); System.out.println(raf.readByte()); raf.seek(0); raf.writeByte(b1[1]); raf.seek(0); System.out.println(raf.readByte()); raf.close(); } catch (IOException ex) { ex.printStackTrace(); } } }