Java tutorial
import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class Main { public static void main(String[] args) throws IOException { byte b = 66; int i = 0; FileOutputStream fos = new FileOutputStream("C://test.txt", true); fos.write(b); fos.flush(); FileInputStream fis = new FileInputStream("C://test.txt"); // read till the end of the file while ((i = fis.read()) != -1) { // convert integer to character char c = (char) i; System.out.print(c); } } }