Display file contents in hexadecimal : FileInputStream « File « Java Tutorial






  1. Java Tutorial
  2. File
  3. FileInputStream
import java.io.FileInputStream;

public class Main {
  public static void main(String[] args) throws Exception {
    FileInputStream fis = new FileInputStream("/home/username/data.txt");

    int i = 0;

    int count = 0;

    while ((i = fis.read()) != -1) {
      if (i != -1) {
        System.out.printf("%02X ", i);
        count++;
      }

      if (count == 16) {
        System.out.println("");
        count = 0;
      }
    }
    fis.close();
  }
}








11.8.FileInputStream
11.8.1.FileInputStream
11.8.2.Create FileInputStream and read, display data
11.8.3.Getting FileChannel from FileInputStream
11.8.4.Creating File Input Streams from file name
11.8.5.Creating FileInputStream from File object
11.8.6.Using a FileDescriptor from getFD() and creating a FileInputStream from FileDescriptor
11.8.7.Constructing FileInputStream to read from a Text File
11.8.8.Skip n bytes while reading the file using FileInputStream
11.8.9.Copy a file with read(byte[] data) and write(byte[] data)
11.8.10.Reading a Binary File
11.8.11.Reading Mixed Data from a File
11.8.12.Read one byte from a file
11.8.13.Read file character by character
11.8.14.Reading a File into a Byte Array: reads the entire contents of a file into a byte array
11.8.15.Read bytes and display their hexadecimal values.
11.8.16.Reading UTF-8 Encoded Data
11.8.17.Reading into a Large Buffer through FileChannel
11.8.18.Display file contents in hexadecimal