Read bytes and display their hexadecimal values in Java

//w w w . j a va2  s. c o  m
import java.io.FileInputStream;

public class Main {
  public static void main(String[] argv) throws Exception {
    FileInputStream fin = new FileInputStream("text.txt");

    int len;
    byte data[] = new byte[16];

    // Read bytes until EOF is encountered.
    do {
      len = fin.read(data);
      for (int j = 0; j < len; j++)
        System.out.printf("%02X ", data[j]);
    } while (len != -1);
  }
}