Java tutorial
import java.io.DataInputStream; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; public class Main { public static void main(String[] args) throws IOException { InputStream is = new FileInputStream("c:\\test.txt"); DataInputStream dis = new DataInputStream(is); int count = is.available(); byte[] bs = new byte[count]; dis.read(bs, 4, 3); for (byte b : bs) { char c = (char) b; if (b == 0) { c = '0'; } System.out.print(c); } } }