FileInputStream : FileInputStream « File « Java Tutorial

  1. The FileInputStream class is a subclass of InputStream.
  2. The FileInputStream class allows you to read binary data sequentially from a file.
  3. The FileInputStream class's constructors allow you to pass either a File object or a path to a file.
public FileInputStream (String path)
public FileInputStream (File file)

public class MainClass {
  public static void main(String[] args) {
    boolean areFilesIdentical = true;
    File file1 = new File("c:\\file1.txt");
    File file2 = new File("c:\\file2.txt");
    if (!file1.exists() || !file2.exists()) {
      System.out.println("One or both files do not exist");
    System.out.println("length:" + file1.length());
    if (file1.length() != file2.length()) {
      System.out.println("lengths not equal");
    try {
      FileInputStream fis1 = new FileInputStream(file1);
      FileInputStream fis2 = new FileInputStream(file2);
      int i1 =;
      int i2 =;
      while (i1 != -1) {
        if (i1 != i2) {
          areFilesIdentical = false;
        i1 =;
        i2 =;
    } catch (IOException e) {
      System.out.println("IO exception");
      areFilesIdentical = false;

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